Radium Engineering 20-0428 Port Injection Kit for 2017-2021 Honda Civic Type R 2

Vehicle Fitment

• 2017-2021 Honda Civic Type R (FK8, 2.0L K20C1 Turbo I4, FWD)

Features

• Port Injection Kit installs between intake manifold and cylinder head
• Enables addition of port injectors alongside OEM direct injection
• Large 0.63" internal bore CNC machined fuel rail
• All 4 ports tapped 8AN ORB (3/4-16 female threads)
• Insulating phenolic spacers isolate fuel rail from cylinder head heat
• Support for alcohol fuels including E85 for high-fuel-flow tuning
• Upper and lower injector hole heights permit 48 mm or 34 mm injectors
• Includes OEM Honda intake manifold gaskets and mounting hardware

Specifications

• Material: CNC machined extruded 6063 aluminum, laser-etched surface
• Fuel rail internal diameter: 0.63"
• Ports: Four threaded 8AN ORB (3/4-16 female)
• Injector O-ring size: 14 mm upper and lower
• Injector height compatibility: 48 mm / 34 mm
• Installation location: Between intake manifold and cylinder head
• Fuel type compatibility: Gasoline and alcohol blends (E85)

Included Components

• 1x Port Injection Kit (adapter plate + fuel rail)
• 1x Mounting hardware kit with phenolic spacers and washers
• 1x OEM Honda intake manifold gasket set

Product Description

The Radium Engineering 20-0428 Port Injection Kit (PIK) is purpose-built for the 2017-2021 Honda Civic Type R (FK8) equipped with the K20C1 2.0L turbocharged engine. Designed for high-horsepower builds, this kit installs directly between the intake manifold and cylinder head to allow the addition of port injectors without interfering with the OEM direct injection system :contentReference[oaicite:3]{index=3}.

Crafted from CNC-machined 6063 aluminum with a laser-etched finish, the port injection rail boasts a large 0.63" bore and four 8AN ORB ports for high flow. Insulating phenolic spacers prevent heat transfer from the cylinder head. The injector brackets support two injector heights (48 mm and 34 mm) with 14 mm O-rings, making it compatible with a wide range of aftermarket injectors :contentReference[oaicite:4]{index=4}.

This kit includes all necessary mounting hardware, phenolic washers, and OEM Honda intake manifold gaskets. Fuel injectors, fittings, hoses, controllers, and throttle body couplers must be sourced separately. Installation often requires an offset silicone coupler or custom throttle body pipe due to manifold spacing. The 20-0428 is compatible with gasoline and E85 fuels, making it an essential upgrade for precision tuning of the FK8 Civic Type R fuel system :contentReference[oaicite:5]{index=5}.