Radium Engineering Fuel Rail – Top Feed Conversion Mazda 13B-REW Secondary

This Radium Engineering secondary fuel rail is specifically designed for the Mazda 13B-REW rotary engine. Its adaptable design supports both the OEM 2-port intake manifold and most popular aftermarket 4-port manifolds with the included hardware and injector seat plugs.

Vehicle Compatibility:

• 1992–2002 Mazda RX-7 (FD3S) with 13B-REW

• Compatible with OEM 2-Port and Aftermarket 4-Port Lower Intake Manifolds

Overview:
CNC machined and anodized for full compatibility with all popular fuel types including ethanol-based fuels (E85), this fuel rail features a large internal bore for maximum flow and performance.

Three 8AN ORB ports offer flexible plumbing options. The center port supports installation of additional components such as:

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

• Fuel pressure transducer

• Radium fuel pulse damper

• Fuel pressure gauge

Stainless steel mounting hardware, thermal insulating spacers, and washers are included to reduce heat transfer into the fuel rail. Two stainless steel M8 extension mounts provide strength and corrosion resistance.

Manifold Notes:

• OEM 2-Port Manifold: Requires use of included 20mm spacers, 2AN ORB plugs, and billet injector seats. Also requires deletion of the factory Air Control Valve (ACV) using Radium P/N: 20-0449 (sold separately).

• Xcessive Manufacturing 4-Port Manifold: Uses included 11mm spacers.

• Elite Rotary Shop 4-Port Manifold: Requires two additional 14mm injector seats (sold separately).

Fuel Injector Compatibility:
Compatible with top-feed fuel injectors using 14mm O-rings and 60mm height. Confirmed direct-fit injectors include:

• Injector Dynamics ID1050-XDS-60-14-14

• Injector Dynamics ID1300-XDS-60-14-14

• Injector Dynamics ID1700-XDS-60-14-14

• Injector Dynamics ID2600-XDS-60-14-14