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3952301 Oil Filter Adapter — Spin-On Conversion for Chevy SBC/BBC V8 Ditch the messy canister oil filter on your classic Chevy V8 and convert to a modern spin-on system. The iFJF 3952301 Oil Filter Adapter replaces the factory bypass-style canister filter housing on small block Chevy (SBC) and big block Chevy (BBC) engines. CNC-machined from 6061-T6 billet aluminum with clear anodized finish — a permanent upgrade that makes every oil change faster, cleaner, and gives you access to modern synthetic filter media. Key Features Spin-On Conversion: Standard 13/16"-16 UNF threaded flange accepts Fram PH5, Wix 51060, AC Delco PF2, and hundreds of other spin-on filters. Bypass Compatible: Retains factory external bypass filtration system — safe for all SBC and BBC engines with original bypass oiling. Universal SBC/BBC Fit: Compatible with all small block Chevy (262-400ci) and big block Chevy (366-454ci) V8 engines using the factory canister-style filter housing. 6061-T6 Billet Aluminum: CNC-machined from solid billet — won't crack, warp, or leak like cast aluminum or pot metal adapters. Complete Kit: Includes adapter body, mounting gasket, grade 8 bolts, and thread sealant for a leak-free installation. Compatibility Engine Family Displacement (ci) Common Applications Small Block Chevy (SBC) 262, 265, 283, 302, 305, 307, 327, 350, 400 Camaro, Chevelle, Nova, C10, Corvette, Impala (1955-2002) Big Block Chevy (BBC) 366, 396, 402, 427, 454 Chevelle SS, Corvette, Caprice, C20/C30, Suburban Specifications Spec Value Part Number 3952301 Material 6061-T6 Billet Aluminum, Clear Anodized Thread Size 13/16"-16 UNF (Standard Spin-On) Gasket Type Fiber-Reinforced Rubber Recommended Torque 18-22 ft-lbs (Block Bolts) Benefits of Spin-On Conversion Faster Oil Changes: Spin off, spin on — no more wrestling with canister bolts and gaskets. Better Filter Availability: Fram PH5 and Wix 51060 filters available at every auto parts store nationwide. Modern Filter Media: Access to synthetic, high-flow, and extended-life filter options not available in canister style. Built-In Anti-Drainback: Most modern spin-on filters include an anti-drainback valve for faster cold-start oil pressure. Cleaner Installation: No more oil running down your arm when removing the canister housing. Installation Guide Drain engine oil completely. Remove factory canister filter housing and bypass valve assembly. Clean engine block mounting surface thoroughly — remove all old gasket material and oil residue. Apply included thread sealant to adapter bolts. Position gasket on adapter. Bolt adapter to engine block. Torque to 18-22 ft-lbs in a crisscross pattern. Pre-fill new spin-on filter with fresh oil. Apply thin film of oil to filter gasket. Spin filter onto adapter — hand-tighten, then additional 3/4 turn. Do NOT use a filter wrench to tighten. Refill engine with correct oil capacity (typically 4-5 quarts for SBC, 5-6 for BBC). Start engine, check oil pressure gauge, inspect adapter and filter for leaks. Frequently Asked Questions Q: Will this fit my 350 SBC with headers?A: Yes. The compact billet aluminum profile was specifically designed to clear most header configurations. The adapter adds minimal depth compared to the factory canister housing. Q: What oil filter should I use?A: The adapter accepts any filter with 13/16"-16 UNF thread. Popular choices: Fram PH5 (standard), Wix 51060 (premium), AC Delco PF2 (OEM), Mobil 1 M1-302 (synthetic extended-life). Q: Does this fit the 400 small block?A: Yes. The 400 SBC uses the same oil filter mounting boss and bypass configuration as all other small block Chevy engines. Direct bolt-on fit. Q: Will this work with an oil cooler adapter?A: Yes. The adapter has the standard SBC/BBC oil filter boss pattern. Most sandwich-style oil cooler adapters fit between the adapter and the spin-on filter. Q: Is this billet adapter better than cast aluminum options?A: Absolutely. Billet 6061-T6 aluminum is significantly stronger and more resistant to cracking than cast aluminum. It also machines to tighter tolerances for a leak-free seal. Worth the investment for a part you'll install once and forget. Q: Does this retain the factory bypass valve?A: This adapter is designed for engines with external bypass filtration. If your engine uses an internal bypass (some later SBC blocks), verify compatibility before ordering. The adapter itself does not include an internal bypass. Related Products Red LED Carbon Fiber Exhaust Tip 10PCS BMW X5 Control Arm Kit Mercedes C250 Control Arm Kit Related Products Edelbrock 1400 Performer 600 CFM Carburetor for GM Chevy V8 Edelbrock 1405 Performer 600 CFM Carburetor — Manual Choke Chevy/GMC GMT800 Silverado/Sierra 1500 Y-Pipe Exhaust Related Guides & Articles Diesel Fuel Filter Replacement: Complete Guide Complete Guide: How to Rebuild Edelbrock 1406 and 1405 Carburetors How to Replace the Serpentine Belt on a 5.9 & 6.7L Cummins 📖 Related Guide: Duramax CAT Oil Filter Adapter Guide: 7791 Conversion — Read our in-depth maintenance guide for step-by-step instructions.

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Product Overview The iFJF 1806 Performer 600 CFM carburetor delivers the ideal balance of street performance and daily driveability for small block and mild big block V8 engines. Featuring electric choke, air valve secondaries, and non-EGR calibration, this 4-barrel square bore carburetor is pre-calibrated for a wide range of engines from 305 to 402 cubic inches. Whether you're upgrading from a worn-out factory carb or building a fresh engine, the 1806 delivers out-of-the-box performance. Key Features 600 CFM — Universal Sweet Spot — The most versatile CFM rating for street V8s. Works well on everything from mild 305s to warmed-up 400s without over-carbureting. Air Valve Secondary — The secondary air valve opens progressively based on airflow demand. No bog, no hesitation — just smooth, seamless power delivery. Electric Choke (12V) — Automatic choke with adjustable housing. Fast warm-up, consistent cold starts in any season. Non-EGR Design — No exhaust gas recirculation provisions. Perfect for pre-emissions vehicles, off-road applications, or engines with EGR delete modifications. Two-Piece Aluminum Construction — Fewer gasket surfaces than three-piece designs. Resists warping and fuel leaks better than pot metal castings. Pre-Calibrated & Flow Tested — Each carburetor is wet-flow tested on a calibration engine before packaging. Ready to run with minimal tuning. Compatibility Engine Family Displacement Typical Vehicles Chevy Small Block 305, 327, 350, 383, 400 Camaro, Chevelle, C10, Nova, Impala, Monte Carlo Ford Windsor/Cleveland 302, 351W, 351C, 400M Mustang, F-150, Bronco, Torino, Cougar Mopar LA/Magnum 318, 340, 360 Charger, Challenger, Dart, Duster, Ram, Dakota AMC V8 304, 360, 390, 401 Javelin, AMX, CJ, Wagoneer, Cherokee Buick/Olds/Pontiac V8 301-403 Square bore intake required Specifications Parameter Value Part Number 1806 CFM Rating 600 CFM Barrel Type 4-Barrel Square Bore Choke 12V Electric Secondary Type Air Valve (Adjustable) Body Material Die-Cast Aluminum (Two-Piece) EGR Non-EGR (No EGR Provisions) Why iFJF Performer 1806? The 600 CFM Performer has been the go-to street performance carburetor for decades. Our 1806 builds on that legacy with modern manufacturing precision. The air valve secondary design is inherently smoother than mechanical secondaries for street driving — you don't get the sudden "hit" that can break tires loose unexpectedly on wet pavement. Combined with the 12V electric choke, this is the set-it-and-forget-it carburetor that starts reliably and drives smoothly from cold mornings to hot summer afternoons. Frequently Asked Questions Q: Will this fit my 350 Chevy with an Edelbrock Performer intake?A: Yes. The 1806 has a standard square bore flange that matches the Edelbrock Performer, Performer RPM, and most other aftermarket intakes. Direct bolt-on — no adapter needed. Q: What's air valve secondary vs. vacuum secondary?A: Air valve secondaries use a spring-loaded flap above the secondary throttle plates. As airflow increases, the valve opens progressively — providing smoother engagement than mechanical secondaries and more precise control than pure vacuum secondaries. Q: Will this work with my TH350 automatic transmission?A: Yes. The throttle lever includes provisions for GM TH350, TH400, 700R4, and 200-4R kickdown cables. Ford AOD and C4/C6 linkages are also supported with the correct bracket. Q: Does non-EGR mean it won't pass emissions?A: Non-EGR carburetors are intended for pre-emissions vehicles (generally pre-1975), off-road vehicles, or vehicles where the EGR system has been removed. Not for use on emissions-controlled vehicles where EGR is required by law. Q: Can I use this on a marine engine?A: No. Marine engines require USCG-approved carburetors with specific safety features (sealed overflow, J-tube venting). Use only marine-rated carburetors on boats. Q: What timing should I run with this carburetor?A: For most small block Chevy engines, start with 10-12° initial timing and 34-36° total mechanical advance by 3,000 RPM. Adjust vacuum advance to provide 10-12° additional under light cruise.

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High-Performance AVS2 Series 650CFM Carburetor The iFJF 1906 4-Barrel Carburetor brings legendary AVS2 performance technology to your engine build. Featuring the advanced annular flow booster design, this 650 CFM carburetor delivers exceptional fuel atomization for crisp throttle response and consistent power delivery. Whether you're upgrading a street cruiser, building a restomod, or preparing for weekend track days, the AVS2 platform provides the tunability and reliability that performance enthusiasts demand. The satin finish adds a premium look that complements any engine bay while providing enhanced corrosion resistance. Annular Booster Technology The defining feature of the AVS2 series is the annular discharge booster ring, which positions multiple fuel discharge ports around the entire circumference of each booster venturi. This design creates a finer fuel mist than traditional single-point boosters, resulting in more complete combustion, improved fuel economy at cruising speeds, and noticeably sharper throttle response. On the dyno, annular boosters have been shown to improve mid-range torque by 5-10 lb-ft compared to equivalent down-leg booster designs on a typical 350 CID small block. Vehicle Compatibility Engine Family Displacement Typical Vehicles Chevrolet Small Block V8 305 / 327 / 350 / 383 / 400 CID Camaro, Chevelle, Nova, Corvette, C10 Truck Ford Small Block V8 289 / 302 / 351W CID Mustang, Fairlane, F-100, Bronco Mopar Small Block 318 / 340 / 360 CID Dart, Duster, Charger, Challenger AMC V8 304 / 360 / 390 CID Javelin, AMX, Jeep CJ/FSJ Pontiac V8 326 / 350 / 389 / 400 CID Firebird, GTO, Grand Prix Technical Specifications Specification Detail CFM Rating 650 Barrels 4-Barrel Mounting Pattern Square Bore (4150-style) Choke Type Electric (12V) Booster Type Annular Discharge Fuel Inlet 3/8" NPT Secondaries Vacuum-Operated (Adjustable Air Valve) Finish Satin Aluminum Part Number 1906 SKU FJ-CBRT-1906 Key Features 650 CFM airflow rating - optimized for 300-400+ HP street performance engines Annular discharge boosters for superior atomization and throttle response Electric choke with fast-idle cam for reliable cold starts Adjustable vacuum secondary air valve - tune secondary engagement without removing carburetor Two-piece cast aluminum body with satin finish Compatible with both manual and automatic transmissions Accepts standard 5-1/8" air cleaner flange Frequently Asked Questions Q: What is the CFM rating and what engines does it support?A: The iFJF 1906 is rated at 650 CFM, making it ideal for small-block V8 engines between 305 and 400 cubic inches. It is perfectly suited for 327, 350, 383, and 400 CID engines in street performance and mild racing applications. Q: What does the annular booster design do?A: The annular discharge booster design provides superior fuel atomization compared to traditional down-leg boosters. This results in improved throttle response, better fuel economy at cruise, and more consistent air-fuel mixture across all RPM ranges. Q: Does this carburetor come with an electric choke?A: Yes, the iFJF 1906 features an integrated electric choke for reliable cold starts. Simply connect to a 12V ignition-switched power source and the choke will automatically adjust based on engine temperature. Q: Is this a square bore or spread bore carburetor?A: This is a square bore (4150-style) carburetor designed to bolt directly onto square bore intake manifolds. It can also be used with spread bore manifolds using an adapter plate (sold separately). Q: What is the satin finish and why does it matter?A: The satin finish is a premium aesthetic treatment that provides a semi-gloss, non-reflective surface. It resists fuel stains and corrosion better than raw aluminum while maintaining a classic performance look that complements any engine bay. Q: Is tuning required out of the box?A: The carburetor comes with baseline calibration suitable for a typical 350 CID engine at sea level. Minor adjustments to idle mixture screws, accelerator pump, and possibly jet changes may be needed based on your specific engine combination, elevation, and performance goals. Q: What makes this different from the standard AVS series?A: The AVS2 series features the upgraded annular flow booster design, improved fuel metering circuits, and a revised air valve system that provides more precise secondary engagement compared to the original AVS design, resulting in smoother power delivery and better mid-range torque. Related Products iFJF Weber 48 IDA Carburetor for VW Air-Cooled Engines iFJF Dodge Ram Cummins 5.9L / 6.7L Diesel Oil Filter iFJF Dodge 5.9L 12V Cummins 3.5" Air Intake Elbow Blog Resources Carburetor Tuning & Installation Guides iFJF Performance News & Updates

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Edelbrock 1406 Performer 600 CFM Carburetor — Electric Choke, AFB-Style The iFJF 1406 Performer Series Carburetor is the go-to 600 CFM 4-barrel for street performance enthusiasts who want plug-and-play reliability. Featuring an electric choke for hassle-free cold starts and the legendary AFB-style air valve secondary design, this carburetor is a direct replacement for the Edelbrock 1406 and fits a wide range of GM, Ford, and Mopar V8 engines. Key Features 600 CFM Airflow — Ideal airflow for mild to moderate street V8 builds from 305 to 454 cubic inches Electric Choke — Automatic cold-start enrichment with 12V connection — no choke cable to route through the firewall AFB-Style Architecture — No power valves to fail; metering rods provide consistent fuel curve across all RPM ranges 4-Barrel Square Bore — Bolts directly to Edelbrock Performer, Performer RPM, and most aftermarket square bore intakes Gold Dichromate Finish — Timeless hot-rod aesthetic with excellent corrosion protection Two-Piece Design — Access jets and metering rods in minutes without removing the carburetor Air Valve Secondary — Smooth, progressive secondary opening eliminates bog Vehicle Compatibility Make Models Engine Chevrolet / GMC Silverado, C/K Series, Camaro, Chevelle, Nova, Impala, Suburban, Blazer 305, 327, 350, 383, 400, 454 V8 Ford / Mercury Mustang, F-150, Torino, Cougar, Fairlane, Galaxy 302, 351W, 351C, 390, 428, 460 V8 Chrysler / Dodge / Plymouth Charger, Challenger, Road Runner, Barracuda, D100/D150 318, 340, 360, 383, 440 V8 Technical Specifications Specification Value CFM Rating 600 CFM Barrels 4-Barrel Choke Type Electric (12V) Flange Type Square Bore Finish Gold Dichromate Secondary Type Air Valve (Mechanical) EGR No EGR Provision Why the 1406? The electric choke on the 1406 makes cold starts effortless — just pump the gas once, turn the key, and the 12V choke element handles the rest. The AFB-style metering rod system delivers consistent air/fuel ratios without the power valve failure headaches common on competing designs. Whether it's a daily-driven Silverado, a weekend Mustang, or a restomod GMC, the 1406 is the most popular street performance carburetor for a reason. Frequently Asked Questions Q: How do I wire the electric choke? A: Connect the choke's positive terminal to a 12V ignition-switched source (key-on power only). The most reliable connection point is the ignition coil positive terminal or the fuse box IGN terminal. Do NOT connect to the alternator or a constant 12V source — the choke only needs power when the engine is running. Q: Will this fit my Ford 302? A: Yes, it fits any engine with a square bore intake manifold. For Ford 302 applications, pair with a Performer or Performer RPM intake manifold. You may need a throttle bracket adapter for Ford throttle cable compatibility. Q: What's the difference between the 1405 and 1406? A: The 1405 has a manual choke (cable-operated), while the 1406 has an electric choke. Internally, the jetting and calibration are nearly identical. Choose the 1406 if you want automatic cold-start convenience; choose the 1405 if you prefer manual control or are building a race/off-road application. Q: Do I need a calibration kit? A: The 1406 comes pre-calibrated for typical street V8 applications from sea level to approximately 4,000 feet. At higher altitudes or for modified engines with aggressive cams, a metering rod/jet calibration kit is recommended. Q: What fuel pressure is required? A: The 1406 operates best at 5.5-6.0 PSI fuel pressure. Use a quality fuel pressure regulator if your mechanical or electric pump exceeds 6.5 PSI, as excessive pressure can overpower the needle and seat. Q: Is this compatible with EGR? A: No — this is a non-EGR carburetor designed for performance applications. For off-road and racing use only where emissions equipment removal is legal. 🔗 Related Products from iFJF 1405 Performer 600 CFM Carburetor (Manual Choke) 1404 Performer 500 CFM Carburetor 1478 Electric Choke Kit for 1405/1406 📚 Helpful Installation Guides 📖 Diesel Engine Cooling System Flush Guide 📖 GM Truck Tie Rod Upgrade Installation 📖 Related Guide Read our How to Rebuild Edelbrock 1406 & 1405 Carburetors for step-by-step rebuild instructions and kit recommendations.

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Product Overview The iFJF 1805 Thunder AVS 650 CFM carburetor delivers classic muscle car performance with modern manufacturing precision. Featuring annular discharge boosters, manual choke operation, and a clean satin-finish aluminum body, it's the go-to upgrade for small block V8s from 283 to 400 cubic inches. Whether you're building a weekend cruiser, a street/strip car, or restoring a classic, the 1805 provides reliable fuel delivery and crisp throttle response. Key Features 650 CFM Airflow — The ideal CFM rating for street-driven small block V8s. Provides excellent throttle response without the low-speed drivability issues that plague oversized carburetors. Annular Discharge Boosters — Eight precision-drilled discharge holes per booster atomize fuel more effectively than single-point boosters, resulting in smoother idle, better part-throttle response, and improved fuel economy. Manual Choke — Simple, reliable cable-operated choke. No electrical connections, no vacuum diaphragms to fail. You control exactly when to engage and disengage. Two-Piece Aluminum Body — Die-cast aluminum construction with fewer gasket surfaces than three-piece designs means fewer potential leak points and greater durability. Square Bore Mounting — Direct bolt-on for most aftermarket 4-barrel intakes (Edelbrock Performer, RPM, Weiand, Holley) and factory square bore manifolds. Compatibility Engine Family Displacement Typical Applications Chevy Small Block 283, 305, 307, 327, 350, 383, 400 Camaro, Chevelle, Nova, C10, Impala, Monte Carlo Ford Small Block 289, 302, 351W Mustang, F-150, Bronco, Fairlane, Torino Mopar Small Block 273, 318, 340, 360 Charger, Challenger, Dart, Duster, Ram AMC V8 290, 304, 343, 360, 390, 401 Javelin, AMX, CJ-5, CJ-7, Wagoneer Buick/Olds/Pontiac 300-455 Square bore intake required (verify manifold pattern) Specifications Parameter Value Part Number 1805 CFM Rating 650 CFM Barrels 4-Barrel Square Bore Choke Manual Choke Booster Type Annular Discharge Primary Jet 0.095" Secondary Jet 0.098" Body Material Die-Cast Aluminum (Satin) Fuel Inlet 5/8"-20 Thread Why iFJF 1805 vs. OEM? Factory carburetors from the 60s-80s are now 40-60 years old. They suffer from warped castings, corroded passages, worn throttle shafts, and degraded accelerator pumps. Our 1805 is brand new — no core required, no rebuilding, no surprises. The annular boosters found on the Thunder AVS are a genuine upgrade over standard boosters, providing fuel atomization comparable to fuel injection at a fraction of the cost. Each unit is wet-flow tested and pre-calibrated for out-of-the-box performance. Frequently Asked Questions Q: Will this bolt onto a stock Chevy 350 intake manifold?A: Yes — as long as your intake manifold has a square bore flange pattern. Most 1966-and-later Chevy small block intakes are square bore. If you have a spread bore manifold (e.g., some Quadrajet applications), you'll need an adapter. Q: What's included in the box?A: Carburetor, base gasket, mounting studs/nuts/washers, and installation instructions. Q: Can I use this with an automatic transmission?A: Yes. The 1805 works with both automatic and manual transmissions. You'll need to connect your transmission's kickdown linkage (TH350/TH400/700R4) using the provided throttle lever. Q: How do I hook up the manual choke?A: Route a universal choke cable (not included) from the choke lever on the carburetor, through the firewall grommet, to a dash-mounted pull knob. Most auto parts stores carry universal choke cable kits for $10-20. Q: Will this work at high altitude (5,000+ ft)?A: At high altitude, you may need to lean the mixture. The 1805 accepts standard Edelbrock/Thunder-series jets and metering rods for calibration. For altitudes above 5,000 ft, go down 1-2 jet sizes.

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Product Overview This iFJF 1901R Quadrajet 4MV 750 CFM 4-barrel carburetor is a precision-engineered replacement for 1966-1973 Chevy vehicles (327, 350, 396, 427, 454 engines) and 1975-1979 C3 Corvettes. Designed as a direct bolt-on upgrade, it delivers reliable fuel delivery with vacuum secondaries and manual choke operation — ideal for street performance, restoration projects, and daily drivers. Key Features 750 CFM Flow Rate — Optimized for small block and big block Chevy engines from 327 to 454 cubic inches, providing balanced air/fuel mixture across the entire RPM range. Vacuum Secondary Operation — Secondaries open progressively based on engine demand, preventing bogging while delivering full power when you need it. Manual Choke Control — Gives you complete control over cold starts — no fussy automatic choke mechanisms to fail. All-Aluminum Construction — Two-piece die-cast aluminum body resists warping, corrosion, and fuel degradation better than original pot metal castings. Square Bore Flange — Standard 4-barrel square bore pattern fits OEM Quadrajet intake manifolds with no adapter required. Compatibility Year Make Model Engine 1966-1973 Chevrolet Camaro, Chevelle, Nova, Impala, C10, C20 327, 350, 396, 427, 454 1975-1979 Chevrolet Corvette (C3) 350, 454 1966-1973 Chevrolet Chevy II, Monte Carlo, El Camino 327, 350, 396, 454 1968-1973 GMC C15, C25, K15, K25 Trucks 350, 396, 454 Specifications Parameter Value Part Number 1901R (Replaces 7026202, 7026203, 7026210, 7027202, 7027203) CFM Rating 750 CFM Barrels 4-Barrel (Square Bore) Choke Type Manual Choke Secondary Type Vacuum Secondary Body Material Die-Cast Aluminum Throttle Bore 1-11/16" Primary / 2-1/4" Secondary Fuel Inlet Single 5/8"-20 Thread Finish Natural Cast Aluminum Why Choose iFJF 1901R Quadrajet? The original Rochester Quadrajet was a brilliant design but suffered from warped bodies, leaky well plugs, and worn throttle shafts after decades of service. Our 1901R replacement addresses all these weaknesses with modern CNC machining, improved aluminum alloy, and precision calibration. You get the signature Quadrajet sound and performance without the headaches of a 50-year-old core. Each unit is wet-flow tested before leaving the factory. We stand behind every carburetor with our satisfaction guarantee. Installation Tips Verify intake manifold is square bore pattern (not spread bore without adapter) Set idle mixture screws to 2-1/2 turns out as starting point Use a phenolic spacer to reduce heat soak on hot starts Check fuel pressure — Quadrajets prefer 5-6 PSI maximum Connect choke cable to manual choke linkage before final mounting Torque mounting bolts to 12-15 ft-lbs in a crisscross pattern Frequently Asked Questions Q: Will this fit my 1969 Camaro with a 350?A: Yes. This 1901R Quadrajet 4MV is a direct replacement for 1966-1973 Chevy 327-454 engines with a square bore intake manifold. Your 1969 Camaro 350 is a perfect match. Q: Does this carburetor come with a gasket?A: Yes, a base gasket is included. We recommend using a quality fiber gasket or 1/4" phenolic spacer for best results. Q: Is this a rebuilt original or brand new?A: This is a 100% brand new carburetor — not a remanufactured or rebuilt core. No core charge, no waiting for a rebuild. Q: Do I need an adapter to install this on a spread bore manifold?A: This is a square bore carburetor. If your intake manifold is a spread bore (common on later Quadrajets), you will need a square-to-spread bore adapter plate (sold separately). Q: How do I adjust the manual choke?A: The choke lever connects to a standard choke cable (not included). Route the cable through your firewall and mount under the dash. Pull to close choke for cold starts, push to open as engine warms. Q: What's the difference between vacuum secondary and mechanical secondary?A: Vacuum secondaries open based on engine load — they only engage when the engine can actually use the extra air/fuel. This prevents bogging and improves driveability on the street compared to mechanical secondaries. Q: Does this carburetor have EGR provisions?A: No. This carburetor does not include EGR provisions, making it ideal for non-emissions applications, off-road use, or vehicles with EGR deleted.

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Edelbrock 1405 Performer 600 CFM Carburetor — Manual Choke, Square Bore The iFJF 1405 Performer Series Carburetor delivers 600 CFM of reliable airflow with a manual choke and classic square bore design. Built as a direct replacement for the legendary Edelbrock 1405, this carburetor is engineered for street performance and daily driving on Chevy small block and big block V8 engines including the Corvette, Silverado, GMC trucks, and 366 Demon Poly applications. Key Features 600 CFM Airflow — Optimized for 305-454 cubic inch V8 engines delivering crisp throttle response Manual Choke — Full driver control over cold-start enrichment, ideal for performance builds 4-Barrel Square Bore — Standard square bore flange fits Edelbrock Performer, Performer RPM, and stock 4-barrel intake manifolds AFB-Style Design — Tried-and-true Carter AFB architecture with no power valves to blow out Gold Dichromate Finish — Classic hot-rod look with superior corrosion resistance Two-Piece Body — Easy to tune and service without removing from the manifold Electric Choke Compatible — Can be upgraded with iFJF 1478 Electric Choke Kit (sold separately) Vehicle Compatibility Make Model Engine Notes Chevrolet Corvette, Camaro, Chevelle, Nova, Silverado, C10, Impala 305, 327, 350, 383, 396, 400, 427, 454 V8 Square bore intake required GMC Sierra, C/K1500, Jimmy, Suburban 305, 350, 396, 454 V8 Verify intake manifold flange Pontiac Firebird, Trans Am, GTO, Grand Prix 350, 400, 455 V8 Aftermarket intake recommended Oldsmobile Cutlass, 442, Delta 88 350, 403, 455 V8 Check hood clearance Technical Specifications Specification Value CFM Rating 600 CFM Barrels 4-Barrel Choke Type Manual Flange Type Square Bore Finish Gold Dichromate Secondary Type Air Valve (Mechanical) Fuel Type Gasoline EGR No EGR Provision Why Choose the iFJF 1405? The AFB-style architecture eliminates power valve failure — a common issue with Holley-style carbs. The two-piece body design allows jet and rod changes without draining fuel or removing the carburetor. Whether you're building a weekend cruiser Corvette, a street/strip Silverado, or restoring a classic GMC, the 1405's 600 CFM flow rate is the sweet spot for street-driven V8s. Frequently Asked Questions Q: Will this fit my stock intake manifold? A: This carburetor has a standard square bore flange pattern. It fits stock 4-barrel square bore intake manifolds found on most 1960s-1980s GM V8 engines. If you have a spread bore intake (Quadrajet-style), you'll need a square bore to spread bore adapter plate. Q: Can I add an electric choke later? A: Yes. The iFJF 1478 Electric Choke Kit is a direct bolt-on upgrade that converts this manual choke carburetor to electric choke operation. Check our store for the 1478 kit. Q: What's the difference between the 1405 and 1406? A: The 1405 comes with a manual choke (cable-operated), while the 1406 has an electric choke. The 1405 is preferred by performance enthusiasts who want full control over cold-start enrichment, while the 1406 is ideal for daily drivers who want set-and-forget convenience. Q: Does this carburetor come pre-tuned out of the box? A: Yes, it comes with factory baseline jetting and metering rods calibrated for 600 CFM on typical street V8 engines. Fine-tuning may be needed based on your specific engine displacement, cam profile, altitude, and exhaust setup. Q: What gaskets and hardware are included? A: The carburetor includes the mounting gasket, fuel inlet fitting, and basic hardware. We recommend purchasing a quality intake manifold gasket set separately for your specific application. Q: Is this carburetor compatible with EGR systems? A: No — this carburetor does not have an EGR provision. It is designed for non-EGR performance applications or vehicles where the EGR system has been removed. For off-road and racing use only where emissions equipment removal is legal. Q: What horsepower range does 600 CFM support? A: A properly tuned 600 CFM carburetor can support 350-450 horsepower on typical street V8 engines. For engines exceeding 450 HP, consider stepping up to a 750 CFM unit. 🔗 Related Products from iFJF 1406 Performer 600 CFM Carburetor (Electric Choke) 1404 Performer 500 CFM Carburetor (Manual Choke) 1403 Performer 500 CFM Carburetor (Electric Choke) 1478 Electric Choke Kit for 1405/1406 📚 Helpful Installation Guides 📖 Diesel Engine Cooling System Flush Guide 📖 GM Truck Tie Rod Upgrade Installation

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