Product Description
D-Series Full Tucked Fuel System
The JBtuned D-Series Full Tucked Fuel System is a complete tank-to-engine-and-back fuel-system replacement for compatible EG and EK Honda Civics equipped with a D-Series engine.
Instead of retaining the original chassis fuel hard lines, this system replaces the fuel plumbing from the fuel tank to the engine and back with a complete JBtuned AN feed-and-return system.
Choose between JBtuned 250 Series rubber hose for conventional pump gasoline or 350 Series PTFE hose for pump gasoline, E85, ethanol-based fuels, and compatible race fuels.
This is the complete-system option for D-Series owners who want to replace aging factory fuel plumbing, increase fuel-system capability, and retain the clean engine-bay layout of a tucked fuel system.
Vehicle & Engine Fitment
Primary applications include:
- 1992-1995 Honda Civic EG with D-Series engine
- 1996-2000 Honda Civic EK with D-Series engine
Also compatible with applicable 1994-2001 Acura Integra DC chassis with a D-Series swap.
Designed for compatible Honda D-Series combinations including:
- D15
- D16
- SOHC VTEC D-Series combinations
- Non-VTEC D-Series combinations
- Other compatible D-Series engines
Final fitment depends on the chassis, fuel rail, fuel pressure regulator, fuel-pump hanger, and other components installed on the vehicle.
If your combination is unusual or your components are not listed in the available options, contact JBtuned before ordering.
Complete Tank-to-Engine-and-Back Fuel System
The D-Series Full Tucked Fuel System removes the original chassis fuel lines from the fuel-system flow path.
Dedicated aftermarket feed and return plumbing runs between the fuel tank and engine bay, allowing the complete fuel system to be configured as one matched setup instead of combining new engine-bay plumbing with aging factory chassis lines.
This can be especially useful when the original fuel lines are corroded, damaged, deteriorated, or no longer appropriate for the requirements of the build.
6AN or 8AN Fuel Feed
The D-Series Full Tucked Fuel System is available with either a 6AN or 8AN main fuel feed.
The fuel return remains 6AN with either feed configuration.
Feed-line size should be selected according to the requirements of the complete fuel system rather than simply choosing the largest option available.
Fuel-pump capability, fuel type, injector demand, regulator, expected engine output, and the rest of the fuel system should all be considered when selecting feed-line size.
Choose the Correct Fuel-Line Material
The D-Series Full Tucked Fuel System is available with two JBtuned hose constructions so the system can be matched to the fuel the vehicle will actually use.
250 Series Rubber Hose – Pump Gasoline
The 250 Series configuration uses rubber-core braided fuel hose and 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.
Choose 250 Series when the vehicle will remain primarily on conventional pump gasoline and broader PTFE fuel compatibility is not required.
350 Series PTFE Hose – Pump Gas / E85 / Race Fuels
The 350 Series configuration uses PTFE fuel hose and is appropriate for:
- Conventional pump gasoline
- E85 and ethanol-based fuels
- Compatible race fuels
- Gasoline vehicles that may move to ethanol-based fuel later
Choosing 350 Series PTFE does not mean the vehicle has to run E85.
It simply provides broader long-term fuel compatibility when that is appropriate for the build.
E85 Compatibility & Flex-Sensor Integration Are Different Things
Selecting the 350 Series PTFE configuration makes the fuel plumbing appropriate for pump gasoline, E85, and other compatible fuels.
That is separate from how the vehicle's engine-management system determines and responds to changing ethanol content.
An ethanol-content sensor is commonly used to provide real-time fuel-composition information to an ECU for a sensor-based flex-fuel strategy. Other engine-management strategies may exist depending on the ECU and tuning platform being used.
The engine-management system must always be configured and tuned appropriately for the fuel and control strategy being used.
Not sure which hose or system configuration you need? Read our guide to E85, PTFE fuel lines, and flex-fuel systems.
Large High-Flow Inline Fuel Filter
The D-Series Full Tucked Fuel System uses a large-body high-flow inline fuel filter with a serviceable 6-micron stainless-steel element.
The filter is incorporated into the complete fuel-system configuration so the feed, filtration, and return system work together as one package.
Clean Tucked Engine-Bay Layout
The Full Tucked Fuel System retains the cleaner engine-bay philosophy of the JBtuned D-Series Level 3 Fuel Line Tuck Kit while extending the new fuel plumbing all the way back to the fuel tank.
The goal is not to make every fuel hose invisible. The goal is to remove unnecessary factory fuel-system clutter and provide a clean, organized AN-style fuel layout that remains serviceable.
Final routing depends on the fuel rail, regulator, intake manifold, header, turbo system, and other components installed on the vehicle.
OEM or Aftermarket D-Series Fuel Rail
The D-Series Full Tucked Fuel System can be configured for the factory Honda D-Series fuel rail or compatible aftermarket D-Series fuel rails.
Select the fuel rail installed on the engine when ordering so JBtuned can provide the appropriate fuel-system connection.
If your fuel rail is not listed, contact JBtuned before ordering.
Fuel Pressure Regulator Compatibility
Fuel pressure regulator requirements depend on the hose configuration, fuel rail, and regulator arrangement selected.
250 Series Configuration
The 250 Series configuration can support compatible OEM-style and aftermarket rail-mounted fuel pressure regulator arrangements where appropriate.
350 Series PTFE Configuration
The 350 Series PTFE configuration requires an appropriate AN-style fuel return connection.
The OEM Honda fuel rail may still be used in compatible configurations, but the factory regulator's hose-barb return connection is not appropriate for the PTFE return-line system.
Customers retaining a compatible OEM Honda fuel rail can consider the AEM Honda / Acura Adjustable Fuel Pressure Regulator for an appropriate adjustable regulator configuration.
Rail-to-Regulator Connection
Some fuel rail and regulator combinations require an additional rail-to-regulator connection.
Select the appropriate Rail-to-Regulator Connection option when ordering so the system can be configured for the components installed on the vehicle.
If you are unsure which configuration applies to your fuel rail and regulator, contact JBtuned before ordering.
Fuel Pump Hanger Upgrade Kit
A complete aftermarket feed-and-return fuel system requires appropriate connections at the fuel tank.
For compatible applications, the system can be combined with the JBtuned Civic / Integra OEM Fuel Pump Hanger Upgrade Kit .
The hanger upgrade allows the factory sending unit to be configured for the new aftermarket feed-and-return plumbing and compatible fuel-pump combinations.
If the vehicle does not already have a properly configured fuel-pump hanger, the correct hanger solution should be addressed as part of the complete-system installation.
Fuel Pump Selection
The fuel pump should be matched to the fuel being used and the actual fuel demand of the engine.
Installing larger fuel lines does not by itself increase the output capability of the fuel pump.
If you need a pump, shop JBtuned Fuel Pumps .
Under-Car Fuel-Line Mounting
Because this system replaces the original chassis fuel lines, the new feed and return plumbing 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 OEM brake hard lines to remain in place.
Select the bracket configuration that matches the feed-line size and hose series being installed.
What Comes With the System
- Complete full-length fuel-feed line assembly in the selected size and hose series
- Complete full-length 6AN fuel-return line assembly
- Large-body high-flow inline fuel filter
- Serviceable 6-micron stainless-steel filter element
- Fuel-rail connection components for the selected configuration
- Fuel-pressure-regulator connection components for the selected configuration
- Required AN connection hardware for the configured fuel system
Exact components vary depending on the chassis, hose material, feed-line size, fuel rail, regulator, fuel-pump hanger, and other selected options.
Fuel pump is not included unless selected.
Fuel pressure regulator is not included unless selected.
Fuel rail is not included.
Already Have the D-Series Level 3 Fuel Line Tuck Kit?
If you already own the JBtuned D-Series Level 3 Fuel Line Tuck Kit , you may not need to purchase the complete D-Series Full Tucked Fuel System.
The Level 3 system already provides the engine-bay feed-and-return plumbing, removes the OEM firewall filter, and incorporates the compact inline filter while retaining the factory chassis fuel lines.
If you later want to replace the remaining factory chassis feed and return lines, add the JBtuned Fuel System Extension Kit .
The Extension Kit continues the compatible Level 3 feed-and-return system back to the fuel tank, allowing you to upgrade the remaining chassis plumbing without repurchasing the engine-bay portion of the system you already own.
Where This Fits in the D-Series Fuel-System Lineup
Level 1 – “I Just Need the Feed Line”
Retain the OEM firewall filter, factory chassis plumbing, and existing return-side system while replacing or upgrading the filter-to-rail feed line.
View the JBtuned D-Series Level 1 Fuel Line .
Level 3 – “I Want It Cleaner / Tucked”
Retain the factory chassis feed and return lines, remove the OEM firewall filter, add a compact inline filter, and upgrade the engine-bay feed and return plumbing.
View the JBtuned D-Series Level 3 Fuel Line Tuck Kit .
D-Series Full Tucked Fuel System
You are here.
Replace the complete chassis fuel plumbing from the fuel tank to the engine and back.
Choose 250 Series for conventional pump gasoline or 350 Series PTFE for pump gasoline, E85, ethanol-based fuels, and compatible race fuels.
D-Series Complete Flex-Fuel System
The JBtuned D-Series Complete Flex-Fuel System provides the same complete tank-to-engine-and-back system scope but is built exclusively with 350 Series PTFE hose and specifically configured around compatible ethanol-content-sensor integration.
Which Complete D-Series System Do I Need?
- D-Series Full Tucked Fuel System: Choose this when you want to replace the complete factory fuel plumbing. Select 250 Series for conventional pump gasoline or 350 Series PTFE for pump gasoline, E85, and compatible race fuels.
- D-Series Complete Flex-Fuel System: Choose this when you want the same complete-system scope but specifically want the fuel plumbing configured around an ethanol-content sensor.
Both complete systems can be used with conventional pump gasoline.
The D-Series Full Tucked Fuel System can also be used with E85 when configured with 350 Series PTFE. The difference is sensor integration, not whether the system is capable of carrying E85.
Ordering Options Explained
Vehicle / Chassis
Select the vehicle receiving the complete D-Series fuel system.
Fuel-Line Material
- 250 Series Rubber Hose: Conventional pump gasoline
- 350 Series PTFE Hose: Pump gasoline, E85, ethanol-based fuels, and compatible race fuels
Choosing 350 Series PTFE does not mean the vehicle has to run E85.
Feed Line Size
Choose either a 6AN or 8AN main fuel feed based on the requirements of the complete fuel system.
The return remains 6AN.
Fuel Rail
Select the OEM or aftermarket D-Series fuel rail installed on the engine.
Different fuel rails require different connection configurations.
Fuel Pressure Regulator
Select the regulator configuration being used with the vehicle.
The 350 Series PTFE configuration requires an appropriate AN-compatible return connection.
Rail-to-Regulator Connection
Select the appropriate connection based on the fuel rail and fuel pressure regulator installed on the engine.
Fuel Pump Hanger Upgrade Kit
Select this option if the factory sending unit has not already been configured for the complete aftermarket feed-and-return system.
Under-Car Fuel Line Brackets
Add the JBtuned Fuel & Brake Line Holder Brackets for clean and secure mounting of compatible aftermarket chassis fuel lines.
Want Flex-Sensor Integration?
The D-Series Full Tucked Fuel System is a complete aftermarket fuel system, but it is not specifically configured around an ethanol-content sensor.
Choosing the 350 Series PTFE option makes the fuel plumbing suitable for pump gasoline, E85, and compatible race fuels. That is separate from sensor integration.
If you specifically want the complete fuel-system layout configured around compatible ethanol-content-sensor installation, choose the JBtuned D-Series Complete Flex-Fuel System .
An ethanol-content sensor is commonly used for sensor-based flex-fuel strategies, but engine-management requirements vary by ECU and tuning platform.
Installation Information
The D-Series Full Tucked Fuel System replaces the factory chassis fuel plumbing from the fuel tank to the engine and back.
Installation requires access to the fuel tank, underbody fuel-line routing, fuel-pump hanger, engine-bay fuel system, fuel rail, and regulator connections.
All fuel lines must be securely mounted and routed away from exhaust heat, sharp edges, moving components, and areas where road debris or abrasion may damage the hose.
Turbocharged and other high-heat applications require additional attention to fuel-line clearance and thermal protection.
After installation, pressurize the fuel system and carefully inspect every connection for leaks before starting or operating the vehicle.
Changes to fuel pressure, fuel pump, injectors, fuel type, or other fuel-system components may require appropriate ECU configuration and tuning.
Professional installation is recommended if you are unfamiliar with complete aftermarket fuel systems or AN plumbing.
For off-road use only.
Questions About Your D-Series Fuel Setup?
If you are unsure whether the D-Series Full Tucked Fuel System or D-Series Complete Flex-Fuel System is right for your car, contact JBtuned with your vehicle, year, D-Series engine, fuel rail, fuel pressure regulator, fuel pump, fuel being used, and engine-management setup.
