Radium Engineering Port Injection Kit Honda Civic Type R 2017-2020 | 20-0428

Vehicle Compatibility

• Honda Civic Type-R FK8

• Honda Civic Type-R FL5

• Acura Integra Type-S DE5

Unlock the fueling capacity needed for serious horsepower with the Radium Engineering Port Injection Kit (PIK), specifically engineered for K20C1 turbocharged engines. Designed for high-output builds, this system adds supplemental port fuel injection while retaining the factory direct injection system, making it ideal for ethanol blends, high boost applications, and track-driven vehicles.

The Radium PIK installs cleanly between the intake manifold and cylinder head, allowing the use of four additional port injectors to support increased fuel demand. This solution is compatible with all fuel types, including E85 and other alcohol-based fuels, and is trusted by builders pushing well beyond the limits of OEM fueling.

Key Features & Benefits

• Adds supplemental port fuel injection for high-horsepower builds

• Retains factory direct injection system

• CNC-machined adapter plate for precise fitment

• Compatible with gasoline, E85, and alcohol fuel blends

• Optimized injector angle for efficient spray into intake ports

• Heat-isolated fuel rail mounting to reduce fuel temperature

• Designed for custom and motorsport fuel system integration

Fuel Rail Design

The included fuel rail is precision CNC-machined from extruded 6063 aluminum and features a large 0.63-inch internal bore to support high fuel flow. A laser-etched finish provides a premium appearance and corrosion resistance.

• Four fuel ports tapped for 8AN ORB (3/4-16 female)

• Two upper ports can be used or plugged depending on harness clearance

• Designed with ample clearance for regulators, dampers, and gauges

• Insulating spacers and washers isolate the rail from cylinder head heat

Injector Compatibility

This kit uses universal fuel injectors with 14mm upper and lower O-rings. Two injector heights are supported, allowing flexibility based on your fueling goals.

Compatible Injector Heights

• 34mm short body (lower mounting holes)

• 48mm medium body (upper mounting holes)

Direct-Fit Injector Examples

• Injector Dynamics ID1050-XDS

• Injector Dynamics ID1300-XDS

• Injector Dynamics ID1700-XDS

• Injector Dynamics ID2600-XDS

(Available in both 34mm and 48mm lengths)

What’s Included

• Port Injection adapter plate

• High-flow custom fuel rail

• Fuel rail mounting brackets and hardware

• OEM Honda intake manifold gaskets

• Insulating spacers and washers

Important Notes

• Fuel injectors, fittings, hoses, wiring, injector controller, and accessories are not included

• Because the intake manifold is spaced away from the head, a custom throttle body pipe or offset silicone coupler is required

• Proper planning is recommended when selecting fittings and accessories to ensure adequate clearance

Ideal For

• High-boost turbo builds

• Ethanol (E85) conversions

• Track and competition vehicles

• Builds exceeding OEM direct-injection fuel limits