Radium Fuel Hanger Plumbing Kit | 2017-2021 Honda Civic Type-R FK8 (20-1085-03 / 20-1085-05)

The FK8's fuel system runs out of headroom long before the K20C1 does, and this kit is the tank-to-firewall fix engineered for the chassis.

The Radium Engineering fuel hanger plumbing kit for the 2017-2021 Honda Civic Type-R FK8 provides everything needed to plumb the Radium 2016+ Civic fuel pump hanger to the engine: a dual fuel pressure regulator, a 0-100 psi gauge, a high flow fuel filter with your choice of element, PTFE lines, billet line retainers, adapter fittings, and hardware. From the hanger outlet, 8AN PTFE hose runs behind the fuel tank to a filter carried in a 2-piece billet mount on the left side of the tank, then a second 8AN PTFE line runs forward, secured by three billet aluminum fuel and brake line retainers that replace the factory plastic clips. Gasoline, E85, and methanol compliant.

Choose Your Kit

• Stainless Filter (20-1085-03): 10 micron stainless element, cleanable and reusable
• Microglass Filter (20-1085-05): 6 micron microglass element for the finest filtration

What You'll Feel

• A complete return-style low pressure system feeding the OEM direct injection HPFP with pressure you set and see on the included gauge
• Port injection readiness built in: the DFPR carries a second independent regulated outlet, plugged from the factory, waiting for a port injection system
• A feed line that actually fits: billet retainers accept the larger 8AN hose where the plastic OEM clips cannot
• Clean OEM integration, with the DFPR bolting to existing threaded holes on the firewall and the stock feed line repurposed as the return
• E85-ready PTFE plumbing end to end

Features

• DFPR dual fuel pressure regulator with two independent outputs: black knob calibrates the OEM direct injection LPFP feed with the included 0-100 psi gauge, green knob governs the auxiliary port injection outlet
• Radium high flow fuel filter with integrated 2-piece billet tank-side mount
• 8AN PTFE fuel feed hoses and 8AN filter adapter fittings
• Three billet aluminum fuel and brake line retainers replacing the OEM plastic clips
• 6AN EFI hose and SAE quick connect adapters converting the OEM feed line into the return, plus 6AN PTFE and a quick connect at the rear for the hanger's return port
• 8AN ORB plug for the unused port injection outlet, 5/32 inch vacuum tubing, misc adapter fittings, stainless hardware

The Details

This kit pairs with the Radium fuel pump hanger for the 2016+ Honda Civic (20-1080 for AEM 50-1220 and DW440 brushless, 20-1082 for Walbro F90000267/274/285), which deletes the factory in-tank regulation and filtration and supports one to three pumps. The DFPR is the clever part: the K20C1 is direct injected, so the primary output regulates low side pressure to the OEM HPFP, while the second output exists for the day a port injection system goes on. If that day comes, the Radium port injection kit for the 2017+ Civic Type-R (20-0428) installs between the intake manifold and head, and connecting it requires only an 8AN ORB DFPR adapter fitting and a fuel line to the green-knob port this kit ships plugged.

Kit Includes

• DFPR fuel pressure regulator and 0-100 psi fuel pressure gauge
• Radium fuel filter in the selected element with billet mount
• 8AN PTFE feed hoses, 8AN filter adapter fittings, 8AN and 6AN fuel hanger fittings
• Three fuel and brake line retainers, SAE quick connect adapters, 5/32 inch vacuum tubing, misc adapter fittings, stainless steel hardware
• NOT included: the fuel pump hanger (20-1080 / 20-1082), fuel pumps, and the port injection system with its DFPR adapter fitting and line

Applications

• 2017-2021 Honda Civic Type-R FK8 with the Radium 2016+ Civic fuel pump hanger

Important Notes

• Tested and installed on the FK8 Type-R only; it may fit other untested 2016+ Civic models, but fitment is not verified by Radium
• Not for the 2023+ FL5 Type-R; the matching Radium hangers also exclude the FL5