Precision Raceworks B58 Port Injection Kit – BMW

OVERVIEW

Direct injection alone becomes a limiting factor once you push past moderate power levels on the B58 — port injection adds supplemental fueling that direct injection can't provide on its own, especially useful for E85 blends. What sets the Precision Raceworks kit apart from competing plate-style or generic PI systems is fuel rail design: the rail is AN6-bore all the way through, rather than an AN6 fitting feeding a narrower internal bore that creates a pressure drop under demand.

SPECS

• Full AN6 fuel rail — true AN6 bore throughout, avoiding the pressure-drop problem seen in cheaper kits
• Even distribution across all 6 cylinders — PRW states this is the only PI kit currently available with even fuel distribution to every cylinder
• Injector-locking rail — built-in locks secure each injector against the ~72+ psi of force that pushes up on the rail, and allow rail removal without excessive fuel spillage
• Genuine Bosch Motorsport injectors, flow-matched statically and dynamically, with a certificate of conformance included
• Flow: 750cc @ 43.5psi industry-standard test pressure, over 1000cc at 72psi — supports builds from roughly 400whp up to 1,000whp
• 100% compatible with E85 and other ethanol blends
• Available in Black or Blue anodized finish

PARTS INCLUDED

• Full AN6 fuel rail with billet fittings and injector locks
• Smooth-bore PTFE fuel lines with stainless/nylon braiding
• Full stainless installation hardware
• OEM-spec manifold gaskets
• Genuine Bosch injectors (750cc) with certificate of conformance

TECH RESOURCES

• Install guide (PDF): PRW B58 Port Injection Install Guide
• Requires an aftermarket 2-piece charge pipe. For G-chassis/Supra: Active Autowerke Charge Pipe (M340i/M440i/A90 Supra)
• Injector controller required — common options: Motiv Re|Flex and Split Second AIC-6 (connection is EV6 / US Car Connector; compatible with AIC and JB4 controllers)
• Feed it with a PRW low-pressure pump — B58 Upgraded Hybrid Fuel Pump; or step up to the PRW Stand Alone AFS™ by chassis: Supra · X3/X3M · M3/M4/M340i/M440i · M2/M240i
• Requires a supporting ECU tune — MHD Super License for B58 (F+G Series)
• Confirm your exact chassis and engine using PRW's fitment guide before ordering
• Not for sale or use in California on any pollution-controlled vehicle per CARB

PART NUMBER

• 601-0175

VEHICLE APPLICATIONS

Note: this is a B58-only listing. See the separate Precision Raceworks S58 Port Injection Kit listing for S58 (G8X M2/M3/M4, F97/F98 X3M/X4M) fitment.