Radium Engineering Port injection kit (Honda Civic K20C engines FK2/FK8/FL5)

Description

The Radium Engineering Port Injection Kit (PIK) installs between the intake manifold and the cylinder head. It permits the use of port injectors to add additional fuel on high-horsepower K20C1 engines. This does NOT replace the OEM direct injection system. The kit includes the PIK adapter plate, custom fuel rail, fuel rail mounting hardware, and OEM Honda gaskets, as shown in the below picture. It is compatible with all fuel types including popular alcohol mixtures such as E85.

Click here to download installation instructions (PDF)

Insulating mounting spacers and washers are included to completely isolate the fuel rail from heat created by the cylinder head and transferred through the mounting bolts. The injectors are at a specific angle to ensure proper spray into the intake ports, as shown below.

This kit is designed for specific top feed fuel injectors with upper and lower O-ring spacing, as depicted below. The upper and lower injector O-rings must be 14mm diameter. The included fuel rail mounting brackets permit 2 different height fuel injectors to be used, as shown below.

NOTES:
1. Fuel injectors, port fittings, fuel hose, wiring, injector controller, etc. are NOT included and must be sourced elsewhere.
2. Because the PIK will space the intake manifold off the head, a custom throttle body pipe will need to be fabricated. Alternatively, an offset silicone coupler can be used with the OEM throttle body pipe.

Injectors

Below are some of the many fuel injectors that are a direct fitment when using the upper holes of the mounting brackets (48mm height injectors). If you are unsure about what injectors to purchase, please contact us.

Below are some of the many fuel injectors that are a direct fit when the using the lower holes of the mounting brackets (34mm height injectors):