Description

COMPATIBILITY

Honda Civic Type-R (FK8)
Honda Civic Type-R (FL5)
Acura Integra Type-S (DE5)

OVERVIEW

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.

The fuel rail features a large 0.63" internal diameter bore. It is CNC machined from extruded 6063 aluminum and laser etched for a high quality surface finish. All 4 ports are machined with 8AN ORB (3/4-16 female) threads. Note that the 2 top fuel rail ports will need to be plugged with 14-0150 unless the plastic OEM wiring harness carrier is modified (see below). For a list of all 8AN ORB adapter fittings, go HERE.

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.

NOTES

Fuel injectors, port fittings, fuel hose, wiring, injector controller, etc. are NOT included and must be sourced elsewhere.
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.

PORTS AND FITTINGS

The fuel rail features four threaded ports that are all tapped for 8AN ORB. What is ORB? Click HERE

8AN ORB Adapter Fittings can be found HERE.
8AN ORB Direct Mount Regulators can be found HERE.
8AN ORB Fuel Pulse Dampers can be found HERE.
Fuel Pressure Gauge Adapters can be found HERE.

If building a custom fuel setup, appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide.

FUEL INJECTOR COMPATIBILITY

This kit uses a universal fuel injector with 14mm upper and lower o-rings. There are two heights that can be used: either the 34mm short body, or the 48mm medium body. These are the only compatible dimensions. Below are dimensional drawings of the compatible injectors.

The included fuel rail mounting brackets permit 2 different height fuel injectors to be used.

Radium does not sell fuel injectors. If you are unsure about what injectors to purchase, contact your favorite injector manufacturer and provide them the information on this page to find compatible products. Below are examples of some of the many fuel injectors that are a direct fitment.

48MM INJECTORS, UPPER MOUNTING HOLES