Product Description
6AN Fuel System Extension Kit – EG / EK Civic & DC Integra
The JBtuned Fuel System Extension Kit replaces the remaining factory chassis fuel plumbing on compatible EG and EK Honda Civics and DC Acura Integras that already have a JBtuned engine-bay feed-and-return or fuel tuck system.
The Extension Kit picks up where the existing JBtuned fuel system stops and continues the 6AN feed and 6AN return all the way back to the fuel tank.
This gives you a modular way to replace the factory chassis fuel lines later without discarding the JBtuned engine-bay fuel system you already purchased.
Vehicle Fitment
- 1992-1995 Honda Civic EG
- 1996-2000 Honda Civic EK
- 1994-2001 Acura Integra DC
Compatibility also depends on the JBtuned engine-bay fuel system already installed.
If you have an older JBtuned kit or are unsure whether your existing fuel-system configuration is compatible, contact JBtuned before ordering.
Compatible JBtuned Fuel Systems
The Fuel System Extension Kit is designed for compatible JBtuned engine-bay fuel systems that initially retain the vehicle's factory chassis feed and return lines.
Compatible applications include:
- K-Series Level 2 Feed & Return Fuel Systems
- K-Series Level 3 Fuel Tuck Kits
- B-Series Fuel Line Tuck Kits
- D-Series Fuel Line Tuck Kits
- H2B Fuel Line Tuck Kits
- Other compatible JBtuned feed-and-return fuel systems
The important requirement is that the existing JBtuned fuel system uses a compatible feed-and-return configuration and terminates at the appropriate chassis fuel-line connection point.
If you are unsure whether your existing JBtuned system can be extended with this kit, contact us before ordering.
Build the Fuel System in Stages
Many JBtuned feed-and-return and fuel tuck systems are designed to retain the factory chassis fuel lines when the engine-bay portion of the system is first installed.
That allows you to upgrade the vehicle in stages instead of replacing the entire fuel system at once.
If the build later requires replacement chassis fuel plumbing, the JBtuned Fuel System Extension Kit allows you to keep the engine-bay fuel system already installed and replace the remaining factory feed and return lines back to the fuel tank.
This lets you upgrade the portion of the fuel system that remains instead of purchasing the engine-bay plumbing again.
6AN Feed & 6AN Return
The JBtuned Fuel System Extension Kit uses a 6AN chassis feed and 6AN chassis return.
Both sides of the return-style fuel system are upgraded together rather than increasing only the feed capacity while continuing to rely on the smaller factory return hard line.
The result is a dedicated aftermarket feed-and-return path between the existing JBtuned engine-bay fuel system and the fuel tank.
250 Series Rubber Hose – Pump Gasoline
The Fuel System Extension Kit uses JBtuned 250 Series rubber-core fuel hose.
JBtuned 250 Series hose is intended for conventional pump gasoline.
While occasional exposure to E85 may occur in some applications, the 250 Series hose is not intended for continuous or full-time E85 use.
If your build is intended for continuous E85, ethanol-based race fuels, or requires broader long-term fuel compatibility, a complete fuel system using JBtuned 350 Series PTFE hose may be more appropriate.
Upgrade the Feed & Return Together
This Extension Kit is intended for return-style fuel systems and replaces both the chassis feed and return together.
When additional chassis fuel-line capacity is needed, JBtuned recommends upgrading both sides of the system rather than installing a larger feed while continuing to rely on the smaller factory return line.
The Fuel System Extension Kit provides that matched chassis-side upgrade while allowing the compatible JBtuned engine-bay fuel system to remain in place.
Fuel Pump Hanger Requirements
Replacing the chassis feed and return all the way to the fuel tank requires appropriate connections at the fuel-pump hanger.
The Extension Kit is intended for use with a compatible modified fuel-pump hanger and cannot connect directly to an untouched OEM hanger.
If your factory sending unit has not already been configured for an aftermarket feed-and-return fuel system, consider the JBtuned Civic / Integra OEM Fuel Pump Hanger Upgrade Kit .
The correct hanger configuration depends on the chassis, fuel pump, and complete fuel-system setup.
Fuel Pump Selection
The fuel pump should be appropriately sized for the engine combination, fuel being used, and expected fuel demand.
Increasing fuel-line size does not by itself increase the output capability of the fuel pump.
If you need a fuel pump, browse JBtuned Fuel Pumps .
Under-Car Fuel-Line Mounting
The new 6AN feed and return lines must be securely supported underneath the vehicle.
For compatible EG, EK, and DC chassis, JBtuned offers JBtuned EG EK Civic / DC Integra Fuel & Brake Line Holder Brackets .
These brackets are designed to organize compatible aftermarket fuel lines while allowing the vehicle's OEM brake hard lines to remain in place.
Select the bracket configuration that matches the fuel-hose series and fuel-line sizes being installed.
What Comes With the Extension Kit
- Pre-assembled 6AN chassis fuel-feed line assembly
- Pre-assembled 6AN chassis fuel-return line assembly
- Connection components for the compatible existing JBtuned fuel system
- Required connection hardware for the configured extension system
Exact connection components vary depending on the chassis, existing JBtuned fuel-system configuration, and fuel-pump hanger setup.
A compatible modified fuel-pump hanger is required.
Fuel pump, hanger upgrade, and under-car mounting brackets are not included unless selected or purchased separately.
Starting From Scratch?
The Fuel System Extension Kit makes the most sense when you already own a compatible JBtuned engine-bay feed-and-return or fuel tuck system and now want to replace the remaining factory chassis fuel lines.
If you are starting a new build and already know you want complete tank-to-engine-and-back fuel plumbing, consider starting with the appropriate JBtuned complete fuel system for your engine and chassis rather than purchasing the system in stages.
Contact JBtuned if you are unsure whether a complete system or a modular engine-bay system with the Extension Kit is the better choice for your build.
Fuel Compatibility
This Extension Kit uses JBtuned 250 Series hose and is intended primarily for conventional pump gasoline.
If you are planning continuous E85 use, fuel compatibility must be considered across the entire fuel system, including hose, filters, seals, regulators, pumps, and other fuel-contact components.
Not sure about the difference between pump-gas hose, PTFE fuel lines, E85 compatibility, and true flex-fuel systems? Read our guide to E85, PTFE fuel lines, and flex-fuel systems.
Ordering Options Explained
Vehicle / Chassis
Select the EG Civic, EK Civic, or DC Integra chassis receiving the fuel-system extension.
Existing JBtuned Fuel System
Select the JBtuned engine-bay fuel system you are extending.
This allows the Extension Kit to be configured for the appropriate connection to your existing system.
Fuel Pump Hanger Upgrade
Select the appropriate JBtuned fuel-pump hanger upgrade if your factory hanger has not already been configured for the aftermarket feed-and-return system.
Fuel Pump
Select this option if you need a compatible fuel pump supplied with the system.
Under-Car Fuel Line Brackets
Add the JBtuned Fuel & Brake Line Holder Brackets for a clean and secure under-car installation on compatible EG, EK, and DC chassis.
Installation Information
Installation replaces the factory chassis feed and return plumbing between the existing JBtuned engine-bay fuel system and the fuel tank.
The vehicle must have a compatible modified fuel-pump hanger capable of connecting to the aftermarket feed-and-return system.
All fuel lines must be securely supported and routed away from exhaust components, sharp edges, moving parts, and areas where excessive heat or abrasion may damage the hose.
After installation, pressurize the fuel system and carefully inspect every connection for leaks before starting or operating the vehicle.
Professional installation is recommended if you are unfamiliar with AN fuel systems, fuel-pump hanger modification, or automotive fuel plumbing.
For off-road use only.
Questions About Compatibility?
If you are unsure whether the JBtuned Fuel System Extension Kit works with your existing setup, contact us with your vehicle, year, engine, existing JBtuned fuel system, fuel pump, fuel being used, and approximate power goals.
