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Radium Engineering port injection kit for B58TU BMW Z4 G29
RADIUM ENGINEERING

Radium Port Injection Kit — B58TU (Z4 G29)

$885.00

Radium Engineering port injection kit for the B58TU — Z4 G29. A supplemental port-injection fuel rail that adds injectors at the intake ports to back up the factory direct injection on big-power E85/blend builds. It supplements — does not replace — the OEM DI.

What it is

An anodized billet adapter plate that mounts between the intake manifold and the head, a CNC-machined billet fuel rail (8AN ORB ports), B58TU intake-port gaskets, and stainless hardware. Injectors are not included — the rail accepts top-feed injectors with 14mm O-rings and a short 34mm body (e.g. Injector Dynamics ID1050-XDS / ID1300-XDS / ID1700-XDS). Compatible with all fuels including E85.

Install note

Because the kit spaces the intake manifold off the head, an aftermarket charge pipe is required for the throttle-body connection, and a low-pressure supply (e.g. a second in-tank pump via a Radium fuel-pump hanger) feeds the port injectors.

Where it fits

Supplemental fueling for high-power B58 builds where direct injection runs out. We tune the engine to the fuel system.

Fitment

2nd-generation B58TU — BMW Z4 G29 (and the shared-engine Toyota GR Supra). Not compatible with 1st-gen B58 (B58B30A). Confirm your engine generation at intake.

Sourcing fueling with the tune? The Fueling Kit — B58 bundles the matched parts + calibration for 8% under à la carte.

Fits engine B58
Fits chassis G29 · G20 · G22 · G42 · G05
Category Fuel
Manufacturer Radium Engineering

Ships from Boca Raton, FL.

WHY WE SHIP RADIUM ENGINEERING
Radium Engineering builds the fuel-system components — surge tanks, fuel rails, catch cans — that keep supply steady when a build pushes past the factory plumbing. A surge tank keeps the pickup fed under hard cornering and high draw, which is exactly the condition that starves a fuel system on a track-driven car. We use Radium parts because the machining and the fitment are clean, and the components are designed to integrate into a fuel system rather than fight it. This is the hardware we add when a build's fueling needs to hold up under conditions the factory tank was never asked to handle.