Radium Fuel Rail - BMW E46 M3 S54 (Rail Only)
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Radium Fuel Rail — BMW E46 M3 S54 (Rail and Mounting Hardware Only)
This Radium Engineering fuel rail is CNC-machined and anodized aluminium, featuring a large 0.65" internal bore capable of supporting all necessary engine power requirements on the BMW E46 M3 S54. Compatible with OEM and aftermarket direct-fitment fuel injectors, and fully compatible with all fuel types including E85 and all alcohol blends.
End ports are tapped for 8AN ORB (3/4"-16 O-ring) and the centre port is 3/8" NPT female — accepting a wide variety of adapter fittings for custom high-flow fuel system builds with aftermarket regulators and custom fuel lines.
Note: This listing includes the fuel rail and mounting hardware only. Fittings and adapters are sold separately. This option is ideal for custom high-flow fuel system builds using an aftermarket regulator and custom fuel lines.
Suits:
- BMW E46 M3 — S54 engine
Specifications:
- Internal bore: 0.65"
- End ports: 8AN ORB (3/4"-16 O-ring thread)
- Centre port: 3/8" NPT female
- Material: CNC-machined anodized aluminium
- Injector compatibility: OEM and aftermarket direct-fitment
- Fuel compatibility: All fuel types including E85 and alcohol blends
- Fittings: Not included — sold separately
Available Part Numbers:
- 20-0070-02 — Fuel Rail, BMW E46 M3 S54 (rail and mounting hardware only)
Why Radium Engineering?
- ✅ Manufactured in the USA to motorsport-grade tolerances
- ✅ CNC-machined anodized aluminium with 0.65" bore for maximum flow on the S54
- ✅ Trusted by tuners and race teams running high-power BMW E46 M3 builds worldwide
- ✅ 8AN ORB end ports and 3/8" NPT centre port for custom high-flow fuel system flexibility
- ✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel sensor integration
What clients say
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Really fast and high quality customer support, my order got to me faster than the quoted time too. No complaints
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The team took a mostly broken car after some work done elsewhere, and have systematically made it reliable and fast for a fair price. The staff are invested in the work they do which also makes a big difference.
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Jeff was extremely helpful in assisting me with my exhaust. Always kept me updated and answered any queries in a timely manner. Will definitely be coming back for my future mods
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Justin and his crew is amazing! Always ready to help and service with a smile. Trusty, friendly and reliable! Had my car sent in for repair twice and it’s fixed on time, at a reasonable price and with no issues. Highly recommended!
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Easy to deal with and part was ordered quickly
