Radium Engineering Fuel Rail, BMW M50/M52/M54/S50/S52

Installation Instructions

PORTS AND FITTINGS

This fuel rail features three 8AN ORB ports, one in the center and one at each end. O-ring style fittings must be used in these ports. No fittings are included with this fuel rail and must be purchased separately.

8AN ORB Adapter Fittings can be found HERE.
8AN ORB Direct Mount Regulators can be found HERE.
8AN ORB Fuel Pulse Dampers can be found HERE.

Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide.

COMPATIBILITY

This rail is compatible with the following BMW engines (M50 / M52 / M52TU / M54 / M56 / S50 / S52)

BMW M50 / S50

The BMW M50 / S50 intake manifold is shown above. NOTE: Compatible with the North American S50B30US. Not compatible with ITBs found on the non US "S50B30" and "S50B32".

The provided mounts for these engines are manufactured from anodized billet aluminum.

BMW M52 / S52

The BMW M52 / S52 intake manifold is shown above.

The provided mounts for these engines are manufactured from anodized billet aluminum.

BMW M52TU / M54 / M56

The BMW M52TU / M54 / M56 intake manifold is shown above. NOTE: not compatible with OEM M56 "coupling-type" fuel injectors.

The provided mounts for these engines are manufactured from stainless steel and polished.

This Radium Engineering fuel rail is CNC machined from extruded 6063 aluminum, black anodized, and laser etched for a high-quality surface finish. 

They are compatible with all fuel types including popular alcohol mixtures such as E85. 

Like the OEM fuel rail, the fuel injector bores are 14mm ID so factory injectors can be used, or any aftermarket injector with the same height and O-rings sizes. Furthermore, provisions for the OEM injector retaining clips are provided.

The fuel rail has three 8AN ORB threaded ports in total. Optionally, Radium FPD-R or FPD-XR fuel pulse dampers fit in the center fuel rail port.

Optionally, Radium DMR fuel pressure regulator can be used on either end.

FUEL INJECTOR COMPATIBILITY

This fuel rail is compatible with factory or OEM equivalent fuel injectors. If upgrading fuel injectors, contact our sales department to verify fitment. Radium Engineering cannot specify any further injector dimensions other than stating ‘OEM equivalent’.

KIT INCLUDES

-Black Anodized Laser Etched Fuel Rail
-Mounting Feet for all Compatible Engines
-Stainless Steel Mounting Hardware