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The Precision Raceworks N54 Return System with Pressure Regulator is designed to work with most BMWs with a fuel pump located on passenger side of car. (see fitment guide for specific models)
This kit allows users to run custom fuel pressures exceeding that of the factory system. This system features a 1:1 boost referenced fuel pressure regulator, -6AN fuel return line, Bulkhead fittings to add return port to tank, and all other necessary brackets and hardware.
All connections are designed in-house and machined from 6061 aluminum then anodized for full E85 compliance. All-female connectors have 2 seals (a primary and secondary seal) to guarantee no possible fuel leaks. The fuel line used by Precision Raceworks is Aeroquip -6AN Socketless hose used in high-end E85 applications built all over the world.