





Radium Fuel Rail, Top Feed Conversion, Mazda 13B-REW Secondary
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Description
Radium Fuel Rail, Top Feed Conversion, Mazda 13B-REW Secondary
Application: Mazda RX-7 FD3S 13B-REW (1992-2002) – secondary injectors
Part Type: Top feed conversion secondary fuel rail
Part Number: 20-0447
The Radium top feed conversion secondary fuel rail for the Mazda 13B-REW is machined from billet aluminium and anodised black, and suits all common fuel types including E85. It features a large internal bore and three 8AN ORB ports, plus an extra centre port for accessories such as the OEM fuel temperature sensor, a pressure transducer or a Radium fuel pulse damper.
The kit includes billet aluminium injector seats, stainless steel mount extensions and thermal spacers, and it also fits the Xcessive Manufacturing 4-port intake manifold using the included 11mm insulating spacers.
Key Features
- Three 8AN ORB Ports: Plus an extra centre port for a fuel temperature sensor, pressure transducer or pulse damper
- Large Internal Bore: High-flow secondary fuel delivery
- Billet Aluminium: Anodised black
- Injector Seats Included: Billet aluminium seats for top feed injectors
- Thermal Spacers: Insulate the rail; 11mm spacers suit the Xcessive Manufacturing 4-port intake
- Fuel Compatibility: All common fuel types including E85
What's Included
- Anodised billet aluminium fuel rail
- Stainless steel mount extensions
- Anodised billet aluminium injector seats
- 2AN ORB plugs
- Thermal spacers
- Mounting hardware
Optional Parts
- Radium Rotary Engine Injector Seat (Single) - Mazda RX-7 FD/Cosmo JC (13B/20B) (20-0444) – two extra seats are required for 4-port intake manifolds
- Radium 14-0421 8AN ORB to M12x1.5mm Female Fitting (14-0421) – adapter for the OEM fuel temperature sensor
Important Notes
- Fuel injectors are not included – universal injectors must be 60mm tall with 14mm O-rings, e.g. Injector Dynamics ID1050-XDS (1050.60.14.14), ID1300-XDS (1300.60.14.14), ID1700-XDS (1700.60.14.14) or ID2600-XDS (2600.60.14.14)
- For 4-port intake manifolds, two additional 20-0444 injector seats must be purchased
- Fits the Xcessive Manufacturing 4-port intake manifold using the included 11mm insulating spacers
- Choose fittings to suit your application and allow ample clearance around the rail ports for regulators, gauges and dampers
- Installation instructions are available in the Instructions tab
Vehicle Fitment
- Mazda RX-7 FD3S (1992-2002) – 13B-REW, secondary injectors
Not sure if this suits your vehicle? Email sales@coore.com.au and our team will confirm fitment.

