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Vacuum Secondary Diaphragm for Holley 4150/4160 — 135-4 Replacement Fix your Holley vacuum secondary carburetor with this direct replacement for the Holley 135-4 diaphragm assembly. When the secondary throttle plates won't open, you're leaving horsepower on the table — this diaphragm restores proper vacuum-actuated secondary operation on Holley 4150, 4160, Demon, and Quick Fuel 4-barrel carbs. Key Features Exact 135-4 replacement — Same dimensions, rod length (2.054"), and spring housing as Holley OEM Ethanol-resistant rubber — Modern diaphragm material resists stiffening from E10/E15 fuels Pre-assembled — Diaphragm, rod, and spring retainer in one unit Includes housing gasket — Die-cut cork gasket for the diaphragm housing cover Compatible Carburetors Series Models CFM Range Holley 4150 0-3310, 0-4777, 0-4779, 0-80508 600-850 Holley 4160 0-1850, 0-80457, 0-80570 450-750 Demon Street/Speed/Mighty Demon (vac sec) 575-850 Quick Fuel HR, SS, Slayer (vac sec models) 580-850 Symptoms of a Failed Diaphragm Secondaries never open — Engine feels like a 2-barrel; tops out early Slow or lazy secondary opening — Diaphragm partially torn; delayed opening Secondaries flutter — Diaphragm has a pinhole leak; vacuum signal inconsistent Rich condition at part throttle — Diaphragm leaking fuel into vacuum chamber Quick TestRemove the vacuum hose from the secondary diaphragm housing. Apply vacuum with a hand pump. The secondary throttle shaft should move and hold position. If it doesn't hold vacuum, the diaphragm is torn. Frequently Asked Questions Q: How do I know if I need 135-4 vs 135-3?A: The 135-4 has a 2.054" rod length for universal Holley 4150/4160. The 135-3 has a shorter rod (Ford/Mopar OEM). Measure your existing rod. Q: Will this fit Quick Fuel SS-series carb?A: Yes. Quick Fuel vacuum secondary carbs use the same diaphragm assembly as Holley. Direct fit for HR, SS, and Slayer series. Q: Can I convert to mechanical secondary using this?A: This diaphragm is for vacuum secondary operation. To convert to mechanical, use this as a plug (block vacuum port) and install a mechanical secondary linkage kit (sold separately). Q: How long does installation take?A: 15-20 minutes. Remove the vacuum secondary housing cover (3 screws), swap the old diaphragm for new, replace the cork gasket. No carb removal required. Related ProductsBrowse more in our collection. Search by part number

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⚠️ OFF-ROAD USE ONLY: This product is intended for off-road and competition use only. Not legal for use on public highways in the United States. Please check your local, state, and federal regulations before purchasing. Product Overview The 5.3L 6.0L LM7 LS EGR Valve Block Off Plates Kit Purge Solenoid Plug Intake/Exhaust is a premium aftermarket replacement part engineered to meet or exceed OEM specifications. this component delivers reliable performance and durability. Manufactured with high-grade materials and precision engineering, it ensures a perfect fit and long service life. Key Features & Benefits Quality Construction: Premium-grade materials for maximum durability and corrosion resistance Quality Construction: Precision-engineered to OEM specifications for exact fitment Quality Construction: Rigorous quality control testing ensures reliable performance Quality Construction: Easy installation with basic hand tools — no modifications required Compatibility & Fitment Application Details Engine 5.3L Technical Specifications Specification Value Part Type Aftermarket Replacement Material High-Grade Steel / Aluminum / Composite Finish Corrosion-Resistant Coating Installation Direct Bolt-On Replacement Warranty 1-Year Limited Warranty Why Choose iFJF? iFJF is a trusted name in aftermarket automotive and powersports parts. Every product undergoes strict quality control to ensure it meets rigorous performance standards. We stand behind our products with responsive customer support and a satisfaction guarantee. Our parts are trusted by professional mechanics and DIY enthusiasts alike for their reliability, fit, and value. Installation Tips Always disconnect the battery before beginning any installation Compare the new part with the old one to verify fitment before installation Use appropriate tools and follow manufacturer torque specifications Clean mounting surfaces thoroughly before installing the new component Test operation after installation to ensure proper function Package Includes 1x 5.3L 6.0L LM7 LS EGR Valve Block Off Plates Kit Purge Solenoid Plug Intake/Exhaust Mounting hardware (if applicable) Installation instructions Frequently Asked Questions Q: Will this fit my vehicle?A: Yes, this is a direct-fit replacement part. Please check the compatibility table above and verify your vehicle's part number or model year to confirm fitment. Q: Is professional installation required?A: No, this part is designed for DIY installation with basic hand tools. However, if you are not comfortable with mechanical work, we recommend having it installed by a certified technician. Q: How does this compare to OEM?A: This aftermarket replacement is manufactured to meet or exceed OEM specifications. It offers the same fit, function, and reliability as the original part at a significantly lower cost. Q: What materials are used?A: Our parts are manufactured using high-grade materials including carbon steel, aluminum alloys, and composite materials selected for durability, heat resistance, and corrosion protection. Q: What warranty is included?A: All iFJF products come with a 1-year limited warranty against manufacturing defects. If you experience any issues, contact our customer support team for a replacement or refund. Q: How fast is shipping?A: Orders are processed within 1-2 business days. Standard shipping takes 3-7 business days within the continental US. Expedited shipping options are available at checkout. Related Products & Resources You May Also Need Browse EGR Delete Kits DPF Delete Solutions Browse All Products Helpful Resources Performance Diesel Upgrades & Modifications Guide Installation Guides & How-To Articles

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CCV/PCV Reroute Delete Kit for 2011-2023 Ford 6.7L Powerstroke Diesel Keep your 6.7L Powerstroke's intake system clean with this CCV reroute kit from iFJF Direct. The factory crankcase ventilation system feeds oil-laden vapors into your intake — coating the turbo, intercooler, and intake manifold with performance-sapping oil residue. This kit provides a clean ventilation solution that keeps your intake tract dry and efficient. Key Features Billet Aluminum Construction: CNC-machined from 6061 aluminum with black anodized finish for superior durability and corrosion resistance in the harsh under-hood environment. Complete Kit: Includes CCV block-off plate, vent hose, fittings, and all necessary hardware for installation. Fits ALL 2011-2023 Ford 6.7L Powerstroke applications. Prevents Intake Oil Buildup: Eliminates oil vapor ingestion that leads to intercooler oil pooling, reduced turbo efficiency, and intake restriction over time. Solid Solution: Provides a durable, permanent solution to eliminate unwanted crankcase pressure while keeping oil out of your intake system. Direct Bolt-On: Designed as a direct replacement for the factory CCV box — no drilling, cutting, or permanent modifications required. Compatibility Make Engine Years Ford F-250 / F-350 / F-450 Super Duty 6.7L Powerstroke V8 Diesel 2011-2023 Ford F-550 / F-650 / F-750 6.7L Powerstroke V8 Diesel 2011-2023 Specifications Specification Value Material 6061 Billet Aluminum (Black Anodized) Fitment 2011-2023 Ford 6.7L Powerstroke Includes Block-off plate, vent hose, fittings, hardware Intended Use Off-road / Competition only Why Choose iFJF Direct? Our CCV kit is machined from genuine 6061 billet aluminum — not cast or extruded — for perfect fit and long-term durability. The black anodized finish resists under-hood heat and corrosion. Satisfaction guaranteed. ⚠️ Important — For Off-Road Use Only This product is intended for off-road and competition use only. Modifying emissions-related components may violate federal, state, and local regulations for on-road vehicles. The purchaser assumes all responsibility for compliance with applicable laws. Frequently Asked Questions Q: What does a CCV reroute kit do?A: The factory CCV (Crankcase Ventilation) system routes oil vapors back into the intake tract, coating the intercooler, turbo, and intake with oil residue. A reroute kit vents these vapors to atmosphere, keeping your intake system clean and preventing performance-robbing oil buildup.Q: Is this for off-road use only?A: Yes — this kit is intended for off-road and competition use only. Removing or modifying emissions-related crankcase ventilation may not comply with on-road emissions regulations in your area. Check local laws before installation on road-going vehicles.Q: What's included in the kit?A: The kit includes a billet aluminum CCV block-off plate, vent hose, and all necessary fittings and hardware. Note: this version does not include an extended vent tube — a simple hose vent is provided for under-hood installation.Q: Will this void my warranty?A: Modifying the emissions system may affect your vehicle's warranty coverage. Consult your dealer or warranty documentation before installation.Q: How difficult is installation?A: Installation is moderate — basic mechanical skills required. The factory CCV box is removed from the valve cover, the block-off plate is installed in its place, and the vent hose is routed. Most DIYers complete the job in 1-2 hours. Order your CCV kit today. Free shipping on orders $50+.

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Product Overview Upgrade your 2013-2018 Dodge Ram 6.7L Cummins with this professional-grade egr delete + cooler delete + throttle valve delete + exhaust pipe. Designed for the Ram 2500/3500, this kit delivers improved engine performance, reduced maintenance issues, and enhanced reliability. Whether you're a professional diesel mechanic or a DIY enthusiast, our precision-engineered components provide a bolt-on solution for your Dodge Ram truck. ⚠️ Off-Road Use Only: This product is intended for off-road and competition use only. Please check your local, state, and federal regulations before purchasing and installing emissions-related components. Key Features Precision Fit: Engineered specifically for 2013-2018 Dodge Ram 6.7L Cummins Ram 2500/3500 — direct bolt-on installation with no modifications required. Heavy-Duty Construction: Built with industrial-grade materials to withstand extreme temperatures and pressures in high-performance diesel applications. Complete Kit: Includes all necessary hardware — gaskets, bolts, block-off plates, and installation components for a straightforward install. Performance Gains: Eliminates common failure points in the OEM EGR/exhaust system, improving exhaust flow, reducing EGTs (Exhaust Gas Temperatures), and enhancing throttle response. Corrosion Resistant: All components feature corrosion-resistant finishes to withstand road salt, moisture, and extreme weather conditions. Compatibility Year Make Model Engine 2013 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2014 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2015 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2016 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2017 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2018 Dodge/Ram 2500/3500 6.7L Cummins Diesel Why Choose iFJF Direct? Quality Assurance: Every component undergoes rigorous quality control inspection before shipping. Expert Support: Our diesel specialists know 6.7L Cummins trucks inside out — installation help is just a message away. Frequently Asked Questions Q: Is this kit compatible with my 2013 Dodge Ram Ram 2500/3500?A: Yes! This kit is designed as a direct bolt-on for 2013-2018 Dodge Ram 6.7L Cummins Ram 2500/3500. No modifications are required for installation on stock vehicles. Q: What tools do I need for installation?A: Basic hand tools including socket set (8mm-19mm), torque wrench, flathead and Phillips screwdrivers, and penetrating oil for rusted fasteners. Most experienced DIY mechanics can complete the installation in 2-4 hours. Q: Will this delete kit trigger a check engine light (CEL)?A: This is a hardware-only kit. For complete functionality, appropriate ECU tuning is recommended to prevent DTCs (Diagnostic Trouble Codes). Professional tuning services are available from third-party providers. Q: Are gaskets and hardware included?A: Yes — all necessary gaskets, bolts, block-off plates, and mounting hardware are included in the kit. We recommend having replacement exhaust manifold gaskets on hand if your vehicle has high mileage. Q: How does this compare to OEM parts?A: Our components are engineered to solve the known failure points in the OEM emissions system. By eliminating problematic EGR coolers, valves, and restrictive exhaust components, you'll experience improved reliability, better fuel economy, and reduced maintenance costs. Q: What material are the block-off plates made from?A: Block-off plates are CNC-machined from 6061-T6 billet aluminum (or 304 stainless steel where noted) — far superior to OEM cast components that are prone to cracking and leaking under heat cycling. Q: Do you offer a warranty?A: Yes! All iFJF Direct products come with a satisfaction guarantee. If you have any issues with fitment or quality, contact our support team for a replacement or refund. Related Products iFJF 2013-2014 6.7L Cummins Dodge Ram Cab & Chassis Throttle Valve Cooler Diesel iFJF 2013-2014 6.7L Dodge Ram Cummins 3500 4'' Exhaust Tube Pipe/Cab & Chassis T iFJF 2013-2018 6.7L Cummins Diesel EGR Delete Kit for Cab & Chassis Dodge Ram iFJF 2013-2018 6.7L Dodge RAM 2500 3500 Cummins Diesel EGR Delete Cooler Throttl

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Product Overview Upgrade your 2013-2018 Dodge Ram 6.7L Cummins with this professional-grade exhaust pipe. Designed for the Ram 2500/3500, this kit delivers improved engine performance, reduced maintenance issues, and enhanced reliability. Whether you're a professional diesel mechanic or a DIY enthusiast, our precision-engineered components provide a bolt-on solution for your Dodge Ram truck. ⚠️ Off-Road Use Only: This product is intended for off-road and competition use only. Please check your local, state, and federal regulations before purchasing and installing emissions-related components. Key Features Precision Fit: Engineered specifically for 2013-2018 Dodge Ram 6.7L Cummins Ram 2500/3500 — direct bolt-on installation with no modifications required. Heavy-Duty Construction: Built with industrial-grade materials to withstand extreme temperatures and pressures in high-performance diesel applications. Complete Kit: Includes all necessary hardware — gaskets, bolts, block-off plates, and installation components for a straightforward install. Performance Gains: Eliminates common failure points in the OEM EGR/exhaust system, improving exhaust flow, reducing EGTs (Exhaust Gas Temperatures), and enhancing throttle response. Corrosion Resistant: All components feature corrosion-resistant finishes to withstand road salt, moisture, and extreme weather conditions. Compatibility Year Make Model Engine 2013 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2014 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2015 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2016 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2017 Dodge/Ram 2500/3500 6.7L Cummins Diesel 2018 Dodge/Ram 2500/3500 6.7L Cummins Diesel Why Choose iFJF Direct? Quality Assurance: Every component undergoes rigorous quality control inspection before shipping. Expert Support: Our diesel specialists know 6.7L Cummins trucks inside out — installation help is just a message away. Frequently Asked Questions Q: Is this kit compatible with my 2013 Dodge Ram Ram 2500/3500?A: Yes! This kit is designed as a direct bolt-on for 2013-2018 Dodge Ram 6.7L Cummins Ram 2500/3500. No modifications are required for installation on stock vehicles. Q: What tools do I need for installation?A: Basic hand tools including socket set (8mm-19mm), torque wrench, flathead and Phillips screwdrivers, and penetrating oil for rusted fasteners. Most experienced DIY mechanics can complete the installation in 2-4 hours. Q: Will this delete kit trigger a check engine light (CEL)?A: This is a hardware-only kit. For complete functionality, appropriate ECU tuning is recommended to prevent DTCs (Diagnostic Trouble Codes). Professional tuning services are available from third-party providers. Q: Are gaskets and hardware included?A: Yes — all necessary gaskets, bolts, block-off plates, and mounting hardware are included in the kit. We recommend having replacement exhaust manifold gaskets on hand if your vehicle has high mileage. Q: How does this compare to OEM parts?A: Our components are engineered to solve the known failure points in the OEM emissions system. By eliminating problematic EGR coolers, valves, and restrictive exhaust components, you'll experience improved reliability, better fuel economy, and reduced maintenance costs. Q: What material are the block-off plates made from?A: Block-off plates are CNC-machined from 6061-T6 billet aluminum (or 304 stainless steel where noted) — far superior to OEM cast components that are prone to cracking and leaking under heat cycling. Q: Do you offer a warranty?A: Yes! All iFJF Direct products come with a satisfaction guarantee. If you have any issues with fitment or quality, contact our support team for a replacement or refund. Related Products iFJF 2013-2014 6.7L Cummins Dodge Ram Cab & Chassis Throttle Valve Cooler Diesel iFJF 2013-2014 6.7L Dodge Ram Cummins 3500 4'' Exhaust Tube Pipe/Cab & Chassis T iFJF 2013-2018 6.7L Cummins Diesel EGR Delete Kit for Cab & Chassis Dodge Ram iFJF 2013-2018 6.7L Dodge RAM 2500 3500 Cummins Diesel EGR Delete Cooler Throttl Related Guide Read our The TRUTH about EGR DELETES... Actual Science! for diesel performance insights, EGR system overview, and off-road tuning considerations.

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Product Overview Give your 2008-2010 Ford 6.4L Powerstroke the most comprehensive reliability upgrade available with the iFJF Triple Combo Kit: Bypass Exhaust Up-Pipes, Coolant Filtration System, and EGR Valve Delete Kit. This all-in-one solution addresses the three most critical failure points of the Navistar 6.4L — cracked exhaust up-pipes, coolant system contamination, and the failure-prone EGR system. By combining all three upgrades into one installation, you save on labor costs while giving your Powerstroke the bulletproofing it needs for heavy towing, high mileage, and long-term durability. ⚠️ OFF-ROAD / COMPETITION USE ONLY: This product is intended for off-road, racing, and competition vehicles only. Removing emissions equipment from on-highway vehicles violates the Clean Air Act. Check local, state, and federal regulations before installation. Kit Components Component 1 — Bypass Exhaust Up-Pipes: Heavy-duty T304 mandrel-bent stainless up-pipes replace the crack-prone OEM pipes and route exhaust directly to the turbo, eliminating the EGR circuit. Component 2 — Coolant Filtration System: Inline coolant filter assembly with high-capacity filter element removes casting sand, rust scale, and silicate gel from the cooling system — the #1 cause of EGR cooler and oil cooler failure on the 6.4L. Component 3 — EGR Valve Delete Kit: CNC-machined 6061-T6 aluminum block-off plates with Viton O-ring seals completely eliminate both EGR valves and EGR coolers from the engine. Key Features Triple Protection: Three failure-point solutions in one box — no need to source separate kits and hope they work together. Coolant Filtration Is Critical: The 6.4L is notorious for casting sand left in the engine block from the manufacturing process. This sand circulates and erodes EGR coolers, oil coolers, and water pump impellers. Our filtration system traps particles as small as 15 microns. Heavy-Duty Up-Pipes: 16-gauge T304 stainless with full-penetration TIG welds at all connections — the permanent fix for the 6.4L up-pipe cracking problem. Complete EGR Elimination: Block-off plates for both horizontal and vertical EGR coolers with Viton O-rings rated to 400°F continuous temperature. Everything Included: Up-pipes, EGR plates, coolant filter housing, high-capacity filter element, mounting bracket, hoses, clamps, gaskets, O-rings, and Grade 8 hardware. Preventive Maintenance Value: The coolant filtration system alone can save thousands in repairs by preventing the cascade failure of EGR cooler → oil cooler → head gaskets that plagues unfiltered 6.4L engines. Compatibility Year Make Model Engine 2008-2010 Ford F-250 / F-350 / F-450 / F-550 Super Duty 6.4L Powerstroke V8 Turbo Diesel Specifications Component Specification Up-Pipe Material T304 Stainless Steel, 16-Gauge, Mandrel-Bent EGR Plate Material 6061-T6 Billet Aluminum, CNC-Machined Coolant Filter Micron Rating 15 Microns (Nominal) Coolant Filter Media Synthetic/Cellulose Blend, High-Capacity Filter Housing Heavy-Duty Aluminum with 1/2" NPT Ports O-Ring Material Viton (High-Temperature, Chemical Resistant) Installation Bolt-on, professional installation recommended (8-12 hrs) Why Choose iFJF iFJF Direct developed this triple combo kit after years of analyzing 6.4L Powerstroke failure patterns. The data is clear: casting sand contamination → eroded EGR cooler → internal coolant leak → hydrolocked engine is a predictable failure chain that can be completely prevented. Our coolant filtration system catches the sand before it causes damage; our EGR delete removes the vulnerable component entirely; and our bypass up-pipes eliminate the exhaust leaks that plague even untouched engines. Installing all three at once is the smartest investment a 6.4L owner can make. Frequently Asked Questions Q: Why does the 6.4L need a coolant filter?A: The Navistar engine block casting process leaves residual sand in the coolant passages. As the engine runs, this sand circulates and erodes internal components. A coolant filter is widely considered essential preventive maintenance for 6.4L longevity. Q: How often should I change the coolant filter?A: Change the first filter after 500 miles (it will catch a significant amount of casting sand). Subsequent filters can be changed at every other oil change or ~15,000 miles. Q: Does this kit include everything needed for installation?A: Yes. The kit includes up-pipes, EGR block-off plates, coolant filter housing, filter element, mounting bracket, hoses, hose clamps, gaskets, O-rings, and all required Grade 8 fasteners. Q: Is tuning required?A: Yes. The EGR delete portion requires ECM tuning to disable EGR-related diagnostic trouble codes. The up-pipe and coolant filter components do not affect engine electronics and can be installed without tuning. Q: Can I install this cab-on?A: Cab-on installation is possible but challenging due to the 6.4L's cramped engine bay. Many installers prefer cab-off for full access to the up-pipe and EGR cooler locations. Plan for a full weekend if doing it yourself cab-on.

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