Description
Product Overview
The iFJF Electric Fuel Pump Bung Adapter Kit is a precision-machined solution for converting a standard 2-inch NPT threaded fuel tank bung to accept an in-tank electric fuel pump. Whether you're doing an EFI conversion, LS swap, or building a fuel cell for racing, this adapter provides a leak-free seal between your tank and pump assembly.
Key Features
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CNC-Machined Billet Aluminum — 6061-T6 aluminum with precision threads — no casting flash or rough thread engagement that can cause leaks or cross-threading.
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2-inch NPT Thread — Standard 2-inch male NPT threads fit the most common aftermarket fuel cell and tank bung size. Tapered thread design creates a self-sealing mechanical connection.
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Universal In-Tank Pump Mounting — Provides a flat, sealed mounting surface for most aftermarket in-tank electric fuel pumps. Drill your bolt pattern and mount the pump.
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Fuel-Resistant O-Ring — Fluorocarbon (Viton-type) O-ring rated for gasoline, diesel, E85, methanol, and ethanol-blended fuels. Won't swell or degrade like standard rubber seals.
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Black Anodized Finish — Corrosion-resistant surface treatment. Won't oxidize inside the fuel tank environment.
Compatibility
| Application |
Detail |
| Thread Size |
2-inch Male NPT (National Pipe Thread) |
| Fits Tank Bung |
2-inch Female NPT |
| Fuel Type |
Gasoline, Diesel, E85, Methanol |
| Pump Type |
In-Tank Electric (Universal Mount) |
Specifications
| Spec |
Value |
| Brand |
iFJF |
| Material |
6061-T6 Billet Aluminum |
| Thread |
2-inch Male NPT |
| Finish |
Black Anodized |
| Seal |
Fluorocarbon O-Ring (Included) |
| Hardware |
Stainless Steel (Included) |
Why Choose iFJF
An EFI conversion shouldn't be held up by a leaky fuel pump adapter. iFJF's billet adapter is machined to exacting tolerances — smooth threads that engage properly, a true flat sealing surface for the O-ring, and black anodizing that holds up to aggressive fuels. Install it once, and it stays sealed.
Installation Instructions
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Drain the fuel tank — Work in a well-ventilated area with no ignition sources. Disconnect battery.
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Clean bung threads — Remove old thread sealant or Teflon tape. Inspect threads for damage. Use a thread chaser if needed.
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Apply thread sealant — Use fuel-rated thread sealant (not Teflon tape — it can shred and clog the pump). Apply to male NPT threads of the adapter.
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Thread adapter into bung — Hand-thread first to avoid cross-threading. Tighten with a large adjustable wrench or pipe wrench. The tapered NPT thread creates the seal — snug is sufficient, do not overtighten.
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Mount fuel pump to adapter — Position your in-tank pump on the adapter's flat face. Mark and drill mounting holes. Bolt pump in place with stainless hardware.
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Wire the pump — Route pump wiring through a sealed grommet or bulkhead connector. Use fuel-rated wire and heat-shrink all connections.
Frequently Asked Questions
Q: What is this adapter used for?
A: This bung adapter allows you to install an in-tank electric fuel pump into a fuel tank with a 2-inch NPT threaded bung. It converts the tank's threaded port to accept an aftermarket electric fuel pump assembly.
Q: Does this fit my fuel tank?
A: It fits any fuel tank with a standard 2-inch female NPT threaded bung. Common on aftermarket fuel cells, racing tanks, and some OEM tank applications. Measure your tank bung inner diameter before ordering.
Q: What material is this made from?
A: CNC-machined from 6061-T6 billet aluminum with a black anodized finish. Includes the adapter body, O-ring seal, and stainless steel mounting hardware.
Q: Can I use this with a return-style fuel system?
A: Yes. The adapter provides a sealed pass-through for the pump assembly. Your pump's return line routing is independent of the adapter — plumb your return line to the tank separately if needed.
Q: Is this compatible with E85 fuel?
A: Yes. The anodized aluminum and fluorocarbon O-ring are compatible with gasoline, E85 ethanol blends, diesel, and methanol racing fuels.
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