Radium Port Injection Fuel Rail Kit - Honda Civic Type-R FK8 17-21/FL5 22+
Radium Port Injection Fuel Rail Kit - Honda Civic Type-R FK8 17-21/FL5 22+
Radium Port Injection Fuel Rail Kit - Honda Civic Type-R FK8 17-21/FL5 22+
Application: Honda Civic Type R FK8 / FL5 and Acura Integra Type S DE5 (K20C1)
Part Type: Port injection kit – adapter plate and fuel rail
Part Number: 20-0428
The Radium Port Injection Kit (PIK) adds a bank of port fuel injectors to the direct-injected Honda K20C1. The kit installs between the intake manifold and the cylinder head, supplying the additional fuel that high-horsepower K20C1 builds need. It does not replace the OEM direct injection system – it works alongside it – and it is compatible with all fuel types including E85 and other alcohol blends.
The fuel rail is CNC-machined from extruded 6063 aluminium with a 16mm (0.63in) internal bore and a laser-etched finish, and the injectors are set at a specific angle for correct spray into the intake ports. Insulating spacers and washers isolate the rail from cylinder head heat.
Key Features
- Supplements OEM Injection: Adds port injection while retaining the factory direct injection system
- Four 8AN ORB Ports: All rail ports tapped 8AN ORB (3/4"-16) for fittings, regulators, dampers or gauges
- Extruded 6063 Aluminium Rail: CNC-machined with a 16mm (0.63in) internal bore and laser-etched finish
- Correct Spray Angle: Injectors are set at a specific angle to target the intake ports
- Thermal Isolation: Insulating spacers and washers isolate the rail from cylinder head heat
- Fuel Compatibility: Suits all fuel types including E85 and other alcohol blends
What's Included
- PIK adapter plate
- Custom fuel rail
- Fuel rail mounting hardware
- OEM Honda gaskets
- Insulating mounting spacers and washers
Optional Parts
- Radium 14-0150 8AN ORB Plug, Round Internal Hex (14-0150) – plugs the two top fuel rail ports (required unless the OEM plastic wiring harness carrier is modified)
Important Notes
- Fuel injectors, port fittings, fuel hose, wiring and an injector controller are not included (Radium does not sell injectors)
- Injectors must be universal-style with 14mm upper and lower O-rings – only 34mm short-body (lower mounting holes) or 48mm medium-body (upper mounting holes) injectors are compatible, e.g. Injector Dynamics 1050/1300/1700/2600-XDS in .34.14.14 or .48.14.14 form
- The kit raises the intake manifold off the head, so a custom fabricated throttle body pipe, or an offset silicone coupler with the OEM pipe, is required
- The two top fuel rail ports must be plugged with 14-0150 plugs unless the plastic OEM wiring harness carrier is modified
- Choose fittings to suit your application and allow ample clearance around the rail ports for regulators, gauges and dampers
- Installation instructions are available in the Instructions tab
Vehicle Fitment
- Honda Civic Type R FK8 – K20C1
- Honda Civic Type R FL5 – K20C1
- Acura Integra Type S DE5 – K20C1
Not sure if this suits your vehicle? Email sales@coore.com.au and our team will confirm fitment.