Product Description
K-Swap OEM Filter-to-Rail Fuel Line – K20 / K24
The JBtuned K-Swap OEM Filter-to-Rail Fuel Line is the simplest way to connect the existing fuel system in an EG or EK Honda Civic, DC Acura Integra, or Honda Del Sol to an aftermarket K-Series fuel rail.
This is Level 1 in the JBtuned K-Swap fuel-system lineup: “I just need it running.”
Level 1 is our returnless-style pump-gas K-swap setup. It retains the vehicle's factory chassis fuel feed and OEM firewall-mounted fuel filter and provides the engine-bay fuel connection needed to supply a K20 or K24 engine with an aftermarket fuel rail.
If your goal is a straightforward K-swap without converting the engine bay to a dedicated return-style fuel system or replacing the rest of the chassis fuel plumbing, this is the place to start.
Vehicle & Engine Fitment
- 1992-1995 Honda Civic EG
- 1996-2000 Honda Civic EK
- 1994-2001 Acura Integra DC
- 1993-1997 Honda Del Sol
- K20 engine swaps
- K24 engine swaps
This line requires a compatible aftermarket K-Series fuel rail.
Select the fuel rail installed on your engine when ordering so JBtuned can configure the appropriate rail connection.
If your fuel rail is not listed or your swap uses an unusual engine, intake manifold, or fuel-rail combination, contact JBtuned before ordering.
Level 1 – Returnless-Style Pump-Gas K-Swap Setup
Factory K-Series applications use a returnless-style engine-side fuel-system arrangement.
Level 1 keeps the K-swap engine-bay plumbing simple by providing the fuel-feed connection needed to adapt the existing Honda chassis fuel system to the aftermarket K-Series fuel rail without adding a dedicated engine-bay return line and external fuel pressure regulator.
This makes Level 1 a good choice for customers who want a straightforward pump-gas K-swap setup without moving immediately into a more complex return-style fuel system.
If you later decide that you want a dedicated feed and return system with an external regulator, Level 2 is the next step.
250 Series Rubber Fuel Hose – Pump Gasoline
The Level 1 K-Swap Fuel Line uses JBtuned 250 Series rubber-core braided fuel hose.
This configuration is intended for conventional pump gasoline.
Level 1 should not be considered a full-time E85 fuel-system configuration.
If your build is intended for continuous E85, ethanol-based race fuel, or requires broader long-term fuel compatibility, move to the JBtuned Level 4 Complete K-Swap Fuel System with the appropriate PTFE fuel-line option.
Retains the OEM Honda Fuel Filter
The Level 1 K-Swap Fuel Line is specifically designed around the factory firewall-mounted Honda fuel filter.
The JBtuned line connects the outlet of the OEM fuel filter to the selected aftermarket K-Series fuel rail.
This allows the original chassis fuel-feed arrangement and OEM filter to remain in place while adapting the engine bay to the K20 or K24 swap.
Single Fuel Feed Line
Level 1 is a feed-line-only K-swap solution.
It does not add the dedicated engine-bay return plumbing, external fuel pressure regulator, and return-style architecture used by Levels 2 and 3.
That distinction is important because Level 2 represents a significant change to the fuel-system layout rather than simply adding another hose.
Aftermarket K-Series Fuel Rail Required
The JBtuned OEM Filter-to-Rail Fuel Line is designed for compatible aftermarket K-Series fuel rails.
Different K20 and K24 fuel rails use different inlet configurations, so select the fuel rail installed on your engine when ordering.
JBtuned configures the line for the selected rail so you do not have to piece together the engine-bay fuel connection from individual adapters and hose components.
If your fuel rail is not listed, contact JBtuned before ordering.
What Comes With the Kit
- Pre-assembled 250 Series engine-bay fuel feed line
- OEM Honda fuel-filter connection
- Fuel-rail connection components for the selected aftermarket rail
- Required connection hardware for the configured feed line
Exact connection components vary depending on the fuel rail selected when ordering.
Aftermarket fuel rail is required and is not included.
Want to Replace the Factory Chassis Feed Line?
Level 1 normally retains the original fuel-feed line running from the fuel tank to the OEM firewall-mounted fuel filter.
If you want to replace that original chassis feed while still keeping the Level 1 returnless-style pump-gas configuration, JBtuned also offers a matching 250 Series tank-to-OEM-filter replacement fuel line.
View the JBtuned Tank-to-OEM-Filter Replacement Fuel Line.
The replacement chassis feed continues the Level 1 fuel system from the tank to the OEM firewall filter while allowing the OEM filter and Level 1 engine-bay configuration to remain in place.
This is a useful modular upgrade for Level 1 or compatible custom pump-gas fuel systems.
This standalone chassis-feed upgrade is not the recommended upgrade path for Levels 2 or 3. Those return-style systems should upgrade the chassis feed and return together rather than increasing only the feed capacity.
JBtuned K-Swap Fuel-System Progression
Not every K-swapped Civic, Integra, or Del Sol needs the same fuel system.
JBtuned offers several levels so you can choose the fuel-system architecture that matches your build today while still having a clear path forward if the car changes later.
Level 1 – “I Just Need It Running”
You are here.
Returnless-style pump-gas setup.
Level 1 retains the OEM firewall filter and factory chassis fuel feed and provides the single engine-bay feed line needed to connect the existing fuel system to an aftermarket K-Series fuel rail.
JBtuned 250 Series hose is used for conventional pump-gas applications.
Level 2 – “I Want Feed & Return”
Ready to convert the K-Series engine side from its simpler returnless arrangement to a dedicated return-style fuel system?
Step up to the JBtuned K-Swap OEM Filter Feed & Return Kit.
Level 2 retains the OEM firewall filter but adds an aftermarket fuel rail, external fuel pressure regulator, and return-side plumbing so the system can use both factory chassis hard lines.
Level 2 is a substantial architectural upgrade from Level 1, not simply the addition of another fuel hose.
Level 3 – “I Want It Cleaner / Tucked”
Want the return-style architecture of Level 2 but also want a cleaner engine bay?
Step up to the JBtuned K-Swap Fuel Tuck Kit.
Level 3 retains the factory chassis fuel lines but removes the large OEM firewall filter, adds a compact inline filter, and uses a cleaner tucked-style engine-bay feed and return layout.
Level 4 – “I Want Serious Fuel Capacity / E85”
For builds that need larger fuel plumbing, complete replacement of the chassis fuel system, or a system designed around continuous E85 and broader fuel compatibility, move to the JBtuned EG/EK Civic & DC Integra K-Swap Complete Fuel System.
Level 4 replaces the factory chassis fuel plumbing from the tank to the engine and back and offers 6AN or 8AN feed sizes along with PTFE fuel-line configurations.
Quick Guide: Which K-Swap Fuel Kit Do I Need?
- Level 1 – “I just need it running.” Returnless-style pump-gas setup. Keep the OEM filter and add the basic feed line to the K-Series rail.
- Level 2 – “I want feed & return.” Convert the K-Series to a return-style system using both OEM chassis hard lines, an aftermarket rail, and an external regulator.
- Level 3 – “I want it cleaner/tucked.” Keep the return-style system and factory chassis lines, but remove the OEM firewall filter and clean up the engine bay.
- Level 4 – “I want serious fuel capacity/E85.” Replace the complete chassis fuel plumbing and move to larger-feed and PTFE fuel-line options.
Level 1 Can Still Be Upgraded
Choosing Level 1 does not mean you are locked into the original chassis fuel-feed line forever.
If you simply want to replace the aging factory chassis feed while keeping a returnless-style pump-gas setup, the matching 250 Series tank-to-OEM-filter replacement line lets you upgrade that section separately.
If you later want to convert the engine to a dedicated return-style system, Level 2 is the correct next step.
If you already know the vehicle will require significantly more fuel capacity or continuous E85 use, starting with Level 4 may make more sense than progressively upgrading the lower levels.
Ordering Options Explained
Vehicle / Chassis
Select the Civic, Integra, or Del Sol chassis receiving the K-Series swap so JBtuned can provide the appropriate configuration.
Fuel Rail
Select the aftermarket K-Series fuel rail installed on the engine.
Different rails use different connection configurations, so choosing the correct fuel rail is important.
Installation Information
This product replaces the engine-bay fuel connection between the OEM firewall-mounted fuel filter and the aftermarket K-Series fuel rail.
Inspect the existing fuel filter, chassis fuel line, and surrounding components before installation.
Route the new fuel line 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 all fuel connections for leaks before starting or operating the vehicle.
Professional installation is recommended if you are unfamiliar with automotive fuel plumbing or K-Series engine swaps.
Questions About Which K-Swap Fuel-System Level You Need?
If you are unsure which JBtuned K-Swap fuel-line system is right for your build, contact us with your vehicle, year, K20/K24 engine, fuel rail, fuel being used, and approximate power goals.
