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Radium Engineering

Radium Port Injection Kit - 17+ Civic Type-R

Radium Port Injection Kit - 17+ Civic Type-R


Regular price $284.95
Regular price $299.95 Sale price $284.95
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Experience the power with the innovative Radium Engineering Port Injection Kit (PIK). Easily installed between the intake manifold and the cylinder head, this kit allows for the addition of port injectors on high-horsepower K20C1 engines. Designed to work alongside the OEM direct injection system, this kit comes with a PIK adapter plate, custom fuel rail, mounting hardware, and OEM Honda gaskets. Don't miss out on the opportunity to unleash your engine's potential with this versatile and compatible kit suited for all fuel types, including popular alcohol mixtures like E85!

The fuel rail has a generous 0.63" bore diameter, expertly made from extruded 6063 aluminum and elegantly engraved for a high-quality look. Each of the 4 ports is equipped with 8AN ORB (3/4-16 female) threads, with the top 2 ports requiring 8AN ORB fittings, unless the OEM wiring harness carrier is adjusted.

Included in this kit are insulating spacers and washers that fully protect the fuel rail from heat generated by the cylinder head and transmitted through the mounting bolts. The injectors are positioned at a precise angle to guarantee accurate spraying into the intake ports, as depicted below.

This kit has been specifically designed for top feed fuel injectors with 14mm diameter upper and lower O-rings. It also includes fuel rail mounting brackets that allow for the use of two different height fuel injectors.




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.


  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.


  • 2017 - 2023 Honda Civic Type-R
  • K20C1 Engine

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 products.

  • Injector Dynamics ID1050-XDS-48-14-14
  • Injector Dynamics ID1300-XDS-48-14-14
  • Injector Dynamics ID1700-XDS-48-14-14
  • Injector Dynamics ID2600-XDS-48-14-14

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):

  • Injector Dynamics ID1050-XDS-34-14-14
  • Injector Dynamics ID1300-XDS-34-14-14
  • Injector Dynamics ID1700-XDS-34-14-14
  • Injector Dynamics ID2600-XDS-34-14-14 

What's Included?

  • PIK adapter plate
  • Custom fuel rail
  • Fuel rail mounting hardware
  • OEM Honda gaskets

Install Guide



We realize that returns and exchanges are a part of the purchasing process and we do our best to make it as easy as possible. If you are not 100% satisfied with your purchase, you can return your order to Liken Motorsports within 30 DAYS from the invoice date.

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Radium Port Injection Kit - 17+ Civic Type-R

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Frequently Asked Questions

Do you ship overseas?

Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.

How long will it take to get my order?

It varies based on your location. Orders processed here will take 1-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details and updates will be provided in your order confirmation email.

Any question?

You can contact us through our contact page! We will be happy to assist you.