Product Description
EG / EK Civic, DC Integra & Del Sol K-Swap OEM Filter Feed & Return Kit - K20 / K24 (Level 2)
The JBtuned Level 2 K-Swap OEM Filter Feed & Return Kit converts EG and EK Honda Civics, DC Acura Integras and Honda Del Sols running a K20 or K24 engine swap to a dedicated return-style engine-bay fuel system.
Level 2 retains the vehicle's OEM firewall-mounted fuel filter and factory chassis feed and return hard lines while adding the engine-bay plumbing needed for a compatible aftermarket K-Series fuel rail and external adjustable fuel pressure regulator.
This is Level 2 in the JBtuned K-Swap fuel-system lineup: “I want feed & return.”
Level 2 at a Glance
- Fitment: 1992-1995 Honda Civic EG, 1996-2000 Honda Civic EK, 1994-2001 Acura Integra DC and 1993-1997 Honda Del Sol
- Engine: K20 and K24 engine swaps
- System Type: Dedicated return-style engine-bay fuel system
- OEM Firewall Fuel Filter: Retained
- Factory Chassis Fuel Feed: Retained
- Factory Chassis Fuel Return: Retained
- Aftermarket Under-Car Fuel Lines: Not required for the base Level 2 system
- Fuel Hose: JBtuned 250 Series rubber-core hose
- Fuel Compatibility: Conventional pump gasoline
- Fuel Rail: Compatible aftermarket K-Series fuel rail required
- Fuel Pressure Regulator: Compatible external adjustable regulator required
- Future Chassis Upgrade: Compatible with the JBtuned Fuel Line Extension Kit
What Comes With the Level 2 Kit
- Pre-assembled engine-bay fuel-feed line assembly from the OEM firewall fuel filter to the selected aftermarket K-Series fuel rail
- Pre-assembled fuel rail-to-regulator line assembly
- Return-line assembly connecting the external fuel pressure regulator to the factory chassis return system
- Fuel-rail connection components for the selected aftermarket K-Series fuel rail
- Required connection hardware for the configured engine-bay fuel system
Exact line and connection configurations vary based on the vehicle, aftermarket fuel rail and regulator configuration selected when ordering.
The aftermarket fuel rail is required and is not included. The fuel pressure regulator is not included unless selected when ordering.
Required Parts Not Included
Aftermarket K-Series Fuel Rail: Level 2 requires a compatible aftermarket K-Series fuel rail. Select the rail installed on your engine when ordering so JBtuned can configure the appropriate connections.
Different K20 and K24 fuel rails use different connection configurations. If your fuel rail is not listed or you are unsure whether it is suitable for a return-style system, contact JBtuned before ordering.
External Adjustable Fuel Pressure Regulator: A compatible external adjustable fuel pressure regulator is required to control fuel pressure and provide the return path back into the vehicle's factory chassis return line. If you do not already have a regulator, shop JBtuned fuel pressure regulators for compatible options.
Fuel Pressure Regulator Mounting: The regulator mounts to the USDM driver-side shock tower. JBtuned offers a dedicated Fuel Pressure Regulator Mounting Bracket for EG / EK Civic and DC Integra that uses the upper control-arm mounting points for a clean, secure installation.
What Level 2 Changes
Level 1 provides a single engine-bay fuel feed while retaining the existing chassis fuel system. Level 2 changes the engine-bay architecture by adding a dedicated return path and external adjustable fuel pressure regulator.
Fuel travels through the vehicle's factory chassis feed and OEM firewall-mounted fuel filter to the aftermarket K-Series fuel rail. The external regulator controls fuel pressure and sends returned fuel back through the vehicle's original chassis return hard line.
This allows the K-swapped vehicle to use both factory fuel hard lines without replacing the complete chassis fuel plumbing.
Retains the OEM Honda Firewall Fuel Filter
Level 2 keeps the factory firewall-mounted Honda fuel filter in the system.
The original chassis fuel-feed line supplies the OEM filter, and the JBtuned Level 2 plumbing continues from the filter into the aftermarket K-Series fuel rail and return-style engine-bay system.
If you want the same dedicated return-style architecture but also want to remove the large OEM firewall filter for a cleaner engine bay, Level 3 is the appropriate next step.
Uses Both Factory Chassis Fuel Lines
Earlier Honda chassis already have separate fuel-feed and fuel-return hard lines running between the engine bay and fuel tank.
Level 2 uses both of those existing lines:
- Factory Feed Hard Line: Supplies fuel through the OEM firewall filter to the engine-bay fuel system
- Factory Return Hard Line: Carries returned fuel from the external regulator back toward the fuel tank
This provides a complete feed-and-return engine-bay layout without requiring aftermarket under-car fuel lines as part of the base Level 2 system.
250 Series Fuel Hose - Pump Gasoline
The Level 2 K-Swap Fuel Line Kit uses JBtuned 250 Series rubber-core fuel hose and is intended for conventional pump-gasoline applications.
250 Series hose is not intended for continuous or full-time E85 use.
If the vehicle will regularly run E85, ethanol-based race fuel or requires broader long-term fuel compatibility, use the JBtuned Level 4 Complete K-Swap Fuel System with the appropriate 350 Series PTFE configuration.
Fuel-system architecture and fuel compatibility are separate choices. Moving to Level 4 allows the chassis plumbing, feed size and hose series to be configured around the requirements of the build.
Vehicle & Engine Fitment
- 1992-1995 Honda Civic EG
- 1996-2000 Honda Civic EK
- 1994-2001 Acura Integra DC / DC2
- 1993-1997 Honda Del Sol
- K20 engine swaps
- K24 engine swaps
K-swapped vehicles can use many combinations of engines, intake manifolds, aftermarket fuel rails and fuel pressure regulators. Select the correct chassis and fuel rail when ordering so JBtuned can configure the system for the components being used.
If your configuration is not represented in the available options, contact JBtuned before ordering.
Ordering Options
Vehicle / Chassis: Select the Civic, Integra or Del Sol chassis receiving the K-Series swap.
Fuel Rail: Select the aftermarket K-Series fuel rail installed on the engine. Different rails require different connection configurations.
Fuel Pressure Regulator: Select this option if you need a compatible external adjustable fuel pressure regulator supplied with the system.
Fuel Pressure Regulator Mounting Bracket: Select the JBtuned mounting bracket if you want the regulator securely mounted to the compatible USDM driver-side shock-tower location.
Want to Replace the Factory Chassis Fuel Lines Later?
Level 2 allows you to use the factory chassis fuel lines now without locking the vehicle into that configuration permanently.
If you later decide to replace the remaining factory chassis feed and return lines, the JBtuned Fuel Line Extension Kit continues the existing Level 2 engine-bay plumbing back to the fuel tank.
This allows you to retain the JBtuned engine-bay system you already purchased while replacing the remaining factory chassis plumbing.
Upgrade the Feed & Return Together
If Level 2 is later upgraded with aftermarket chassis fuel plumbing, the feed and return should be upgraded together.
The standalone Tank-to-OEM-Filter Replacement Fuel Line offered for Level 1 replaces only the chassis feed and is not the recommended chassis upgrade path for Level 2.
The JBtuned Fuel Line Extension Kit continues both the feed and return from the existing Level 2 engine-bay system to the fuel tank.
Fuel Pump Hanger & Under-Car Line Support
When Level 2 is expanded with the Fuel Line Extension Kit, the new aftermarket feed and return plumbing must connect properly at the fuel tank.
If the factory hanger has not already been configured for the aftermarket AN plumbing being used, see the JBtuned Civic / Integra OEM Fuel Pump Hanger Upgrade Kit.
For compatible EG, EK and DC chassis, JBtuned also offers JBtuned EG EK Civic / DC Integra Fuel & Brake Line Holder Brackets for supporting compatible aftermarket feed and return lines underneath the vehicle while allowing the OEM brake hard lines to remain in place.
These brackets are intended for JBtuned and compatible aftermarket fuel lines rather than the original OEM fuel lines.
Fuel Compatibility & Future Upgrades
The fuel-system Level describes the architecture of the system. Fuel compatibility, required fuel volume and future fuel-system demands should be considered separately when planning the build.
If the long-term goal includes complete replacement of the factory chassis fuel plumbing, continuous E85 use or broader fuel compatibility, consider the JBtuned Level 4 Complete K-Swap Fuel System with the appropriate feed size and hose-series configuration.
Not sure which fuel-system configuration is appropriate? Read our guide to E85, PTFE fuel lines and flex-fuel systems.
JBtuned K-Swap Fuel-System Levels
- Level 1 - “I Just Need It Running”: Simple engine-bay feed upgrade using the OEM firewall filter and factory chassis fuel supply.
- Level 2 - “I Want Feed & Return”: Dedicated return-style engine-bay system that retains the OEM firewall filter and factory chassis feed and return hard lines. You are here.
- Level 3 - “I Want It Cleaner / Tucked”: Dedicated return-style system that removes the OEM firewall filter, adds a compact inline filter and retains the factory chassis feed and return hard lines.
- Level 4 - “I Want to Replace Everything”: Complete aftermarket feed-and-return plumbing from the fuel tank to the engine and back, with feed size and hose series selected to match the build.
View Level 1 | View Level 3 | View Level 4
Which Level Should I Choose?
Choose Level 1 if you only need the engine-bay fuel-feed connection from the OEM firewall filter to an aftermarket K-Series fuel rail.
Choose Level 2 if you want a dedicated feed-and-return engine-bay system while retaining the OEM firewall filter and both factory chassis fuel lines.
Choose Level 3 if you want the dedicated return-style architecture of Level 2 but also want to remove the large OEM firewall filter and use a cleaner tucked engine-bay layout.
Choose Level 4 if you want to replace the factory chassis fuel plumbing with a complete aftermarket feed-and-return system from the fuel tank to the engine and back.
Installation Notes
- This kit retains the OEM firewall-mounted fuel filter and factory chassis feed and return hard lines while converting the K-Series engine side to a dedicated return-style fuel-system arrangement.
- Inspect the existing fuel filter, chassis feed line, chassis return line and surrounding components before installation.
- All fuel lines must be securely mounted 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 automotive fuel plumbing, adjustable fuel pressure regulators or K-Series engine swaps.
For off-road use only.
Questions About Your K-Swap Fuel System?
If you are unsure which JBtuned K-Swap fuel-system level is right for your build, contact JBtuned with your vehicle, year, K20/K24 engine, fuel rail, regulator, fuel being used and approximate power goals.
