Precision Raceworks B58 Port Injection Kit (950cc) – BMW F & G Series / Supra MkV

Fits: All BMW B58 engines, Gen 1 and Gen 2 (including mild hybrid) – M140i, M240i, 340i, 440i, 540i, 640i, 740i/Li, 840i, M340i, M440i, X3/X4 M40i, X5/X6/X7 40i, Z4 M40i, plus Toyota Supra MkV and Morgan Plus Six.
Doesn't fit: S58 (X3M/X4M/M2/M3/M4) – separate kit. Requires an aftermarket two-piece charge pipe.

Port injection for serious B58 power

Precision Raceworks' port injection kit adds a second set of six injectors to your B58, fed from the low pressure fuel system. It takes the load off the direct injection system so you can make big power on E85 – supporting builds from 400whp up to 1,000whp+ depending on fuel and supporting mods.

This kit comes with genuine Bosch Motorsport 950cc injectors, flow matched to 2% or better with a certificate of conformance, and spraying evenly across all cylinders.

Specifications

• Injectors: Bosch Motorsport 950cc @ 43.5 psi (1226cc @ 72.5 psi)
• Connector: EV6 ("US car")
• Fuel compatibility: all known fuels including full E85
• Weight: approx. 1.6kg

What's included

• Port injection fuel rail (black or blue)
• 6 x Bosch Motorsport 950cc injectors, flow matched
• Smooth bore PTFE fuel line with stainless and nylon braid
• Full stainless hardware
• OEM-spec intake manifold gaskets

What else you'll need

• Aftermarket two-piece charge pipe (required for clearance)
• Port injection controller – e.g. Motiv ReFlex+ (also works with AIC and JB4)
• Upgraded low pressure (in-tank) fuel pump to feed the extra injectors
• Flex fuel sensor and a tune set up for port injection

Installation is not offered – we recommend fitting and tuning by an experienced BMW workshop.

Usually dispatched within 5–14 business days.

FAQ

Does this fit my F22 M240i (Gen 1 B58)?
Yes. The kit fits all Gen 1 and Gen 2 B58 engines.

750cc or 950cc injectors?
The 950cc injectors give more headroom for high power on full E85. This listing is the 950cc kit.

Do I need a controller and tune?
Yes. You'll need a port injection controller such as the Motiv ReFlex+ and a tune that supports port injection.

Do I need to upgrade my fuel pump?
Yes. Port injection runs off the low pressure system, so an upgraded in-tank pump is needed to supply both the high pressure pump and the port injectors.