NRW E9X S65 Billet Fuel Rail System

BMW E9x M3 S65 Billet Aluminum Fuel Rails

A Serviceable, Performance-Ready Replacement for Aging OEM S65 Fuel Rails

Developed as a direct replacement for the factory S65 fuel rail system, the NRW Design billet fuel rails address one of the concerns owners face as the E9x M3 platform continues to age: deterioration and potential leakage from the non-serviceable factory fuel rail crossover hose.

Rather than replacing aging components with another factory-style assembly, NRW Design engineered a fully serviceable billet aluminum fuel rail system designed for both stock and upgraded fuel systems. Whether you’re maintaining a naturally aspirated street car, building an E85 setup, or upgrading to a return-style fuel system, these rails provide the flexibility to grow with your build.

CNC-Machined 6061-T6 Billet Aluminum Construction

Each fuel rail is precision CNC-machined from 6061-T6 billet aluminum and anodized for long-term corrosion resistance, durability, and a premium appearance. The system utilizes Racetronix AN fittings and Radium Engineering EFI hose, with components selected for compatibility with both gasoline and E85 applications.

Stock or Return-Style Fuel System Compatibility

The rails are designed with -8 ORB ports at both ends of each rail. For factory-style applications, the rails can be installed using the supplied closed-loop configuration. For higher-performance builds requiring a return-style fuel system, the ORB ports allow a return line to an external fuel pressure regulator and fuel tank.

Integrated Fuel Pressure Monitoring

A 1/8-inch NPT female port is machined directly into the fuel rail. It can be used with an analog fuel pressure gauge, including the optional Radium fuel pressure gauge, or with a compatible electronic fuel pressure sensor for standalone engine-management and data-logging applications.

Bosch EV14L Injector Compatibility

Designed for use with Bosch EV14L-style fuel injectors, with a dedicated injector locking plate to securely retain the injectors. For stock fuel-system applications, the kit maintains an OEM-style fuel supply entry location for straightforward installation.

Complete Plug-and-Play Package

For customers retaining the factory fuel system, the kit comes complete with the required hoses, Racetronix AN fittings, and ORB fittings needed for installation. A hose configuration for use with the NRW Design Inline Fuel Filter is also available.

Key Features

• Designed specifically for the BMW E9x M3 S65 V8
• Direct replacement for the factory S65 fuel rails
• CNC-machined 6061-T6 billet aluminum
• Durable anodized finish
• Compatible with Bosch EV14L-style injectors
• -8 ORB ports at both ends of each fuel rail
• Injector locking plates for secure injector retention
• Integrated 1/8-inch NPT female fuel pressure port
• Supports analog gauges and electronic pressure sensors / data logging
• OEM-style fuel supply entry location
• Racetronix AN fittings and Radium Engineering EFI hose
• Gasoline and E85 compatible
• Works with factory-style or return-style fuel systems

Optional Fuel Pressure Gauge

A Radium fuel pressure gauge is available as an add-on. Any compatible 1/8-inch NPT fuel pressure gauge or sensor can also be used.

Installation note: Use appropriate thread sealant on NPT fittings and follow the fitting or sealant manufacturer’s recommendations for fuel-system applications.

Important Fuel Hose Selection Information

The NRW Design Inline Fuel Filter is not included with this fuel rail kit. The options refer to the fuel hose configuration included with your kit. The hose for the factory fuel system is different from the hose required when using the NRW Design Inline Fuel Filter, so please select the correct configuration when ordering.

For fitment or configuration questions, please contact us before ordering.

Precision machined. Fully serviceable. Built for the S65. Designed and manufactured by NRW Design in the USA.