Radium Engineering Fuel Rail – Top Feed Conversion Mazda 13B Primary

This Radium Engineering high flow primary fuel rail is designed for the 13B-RE and 13B-REW rotary engines found in the 1990–1995 Mazda/Eunos Cosmo and 1992–2002 Mazda RX-7 FD3S. CNC machined and anodized for full compatibility with all popular fuel types including E85, the fuel rail supports all necessary engine power requirements thanks to its large internal bore.

Vehicle Compatibility:

• 1990–1995 Mazda/Eunos Cosmo (13B-RE)

• 1992–2002 Mazda RX-7 FD3S (13B-REW)

Overview:

The fuel rail features three 8AN ORB ports, allowing for flexible plumbing solutions. The center port provides a convenient location for auxiliary components such as:

• OEM fuel temperature sensor (via adapter 14-0421)

• Pressure transducer

• Radium Engineering fuel pulse damper

Included thermal insulating spacers and stainless steel hardware help minimize heat transfer into the fuel rail.

The billet 14mm injector seats are engineered to fit with or without the OEM diffuser inserts and include high-quality FKM O-rings, making them ideal for boosted applications.

Fuel Injector Compatibility:

This fuel rail supports aftermarket top-feed injectors using 34mm height and 14mm O-rings. Confirmed fitments include:

• Injector Dynamics ID1050-XDS-34-14-14

• Injector Dynamics ID1300-XDS-34-14-14

• Injector Dynamics ID1700-XDS-34-14-14

• Injector Dynamics ID2600-XDS-34-14-14