The Radium Engineering Port Injection Kit (PIK) installs
between the intake manifold and the cylinder head and permits the use of port
injectors to add additional fuel for high-horsepower modified K20C1 engines,
commonly found in the FK8 Civic Type-R. 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 an 8AN ORB (3/4-16
female) threads. Note that the 2 top fuel rail ports will need to be plugged
unless the plastic OEM wiring harness carrier is modified (see below). For a
list of all 8AN ORB adapter fittings, go HERE.
Machined phenolic 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.
FUEL INJECTORS MUST
BE SOURCED ELSEWHERE. Consult the fitment guide below before purchasing
FUEL INJECTOR COMPATIBILITY
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, contact your favorite injector
manufacturer and provide them the information on this page to find compatible