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Radium Engineering

Radium Engineering Port Injection Kit, BMW / Toyota B58 Gen2

Radium Engineering Port Injection Kit, BMW / Toyota B58 Gen2

Regular price $749.99 USD
Regular price $749.99 USD Sale price $749.99 USD
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Kit Options
Add Fuel Injectors

Installation Instructions


The Radium Engineering Port Injection Kit (PIK) installs between the intake manifold and the cylinder head. It permits the use of port injectors for the additional fuel required for highly-modified B58TU engines. This does NOT replace the OEM direct injection system.  

The fuel rail is CNC machined from extruded 6063 aluminum and laser etched for a high quality surface finish. Both end ports are machined with 8AN ORB (3/4-16 female) threads. 8AN ORB Adapter Fittings available here.

The injectors are mounted at a calculated angle to ensure proper spray into the center of the intake ports without sacrificing interference from surrounding components.

The PIK adapter plate can also be used as a simple intake manifold spacer without using the fuel rail by using 2AN ORB Plugs, pictured below.

Relocation hardware is provided to allow the OEM engine vanity cover to be reused.

These 4 adapters install into the underside of the vanity engine cover and make up for the intake manifold shifting.


2020+ Toyota GR Supra (A90/A91)
2018+ BMW Z4 (G29)


1. Compatible with the 2nd generation B58TU engines listed below.

-B58B30O1 (B58B30B)
-B58B30M1 (B58B30C)

2. NOT compatible with the 1st generation B58B30M0 (B58B30A) engine.


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.

Below are some of the many fuel injectors that are a direct fitment. 

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 


The fuel rail features 2 threaded ports that are tapped for 8AN ORB. 8AN ORB Adapter available here and 8AN ORB Adapter Fittings available 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.


-Anodized Aluminum PIK Adapter Plate
-Anodized Aluminum Fuel Rail 
-Engine Cover Relocation Hardware
-B58TU Intake Port Gaskets (x6) 
-Stainless Steel Hardware


1. Fuel injectors, port fittings, fuel hose, wiring, injector controller, charge pipe, etc. are NOT included in 20-0735.
2. See the 20-0753-PK (below) for a plumbing kit that provides the necessary adapter fittings and hose to connect to the OEM fuel line.
3. Because the PIK will space the intake manifold off the head, an aftermarket charge pipe will be required for the throttle body connection.
4. Compatible with all fuel types including popular alcohol mixtures such as E85.


This kit permits the OEM low pressure fuel feed hose to be connected to the rear of the port injection fuel rail. Installs in under 10 minutes. If using an independent port injection fuel system this plumbing kit would not be required.


-SAE Quick Connect Tee PTFE Hose Assembly
-Preassembled 6AN PTFE Fuel Hose
-8AN ORB to 6AN Male Fitting
-8AN ORB Plug


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