Radium Engineering Fuel Rail (Top Feed Secondary)
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Radium Engineering Fuel Rail (Top Feed Secondary) - Mazda (13B-REW)
This Radium Engineering secondary fuel rail (SKU 20-0447) is a top feed conversion for the Mazda 13B-REW rotary in the 1992–2002 RX-7 (FD3S). It has a large internal bore to support high power, is black anodised for compatibility with all popular fuel types including E85, and suits both the OEM 2-port lower intake manifold and popular aftermarket 4-port manifolds using the included hardware.
Three 8AN ORB ports give flexible plumbing, and the extra centre port can take accessories such as the OEM fuel temperature sensor (via adapter 14-0421), a pressure transducer, a Radium fuel pulse damper or a gauge. Stainless mounting hardware, thermal insulating spacers and washers reduce heat transfer into the rail, with two stainless M8 extension mounts.
Note: On the OEM 2-port manifold, use the included 20mm spacers, 2AN ORB plugs and billet injector seats, and the factory Air Control Valve must be deleted with Radium 20-0449 (sold separately). The Xcessive Manufacturing 4-port manifold uses the included 11mm spacers; the Elite Rotary Shop 4-port manifold needs two additional 14mm injector seats (sold separately). Injectors are not included. Installation by a professional is recommended.
Features
- Top feed secondary rail for the 13B-REW
- Suits OEM 2-port and popular aftermarket 4-port lower intake manifolds
- Three 8AN ORB ports, including a centre accessory port
- Black anodised, compatible with E85
- Stainless mounting hardware with thermal insulating spacers and washers
- Two stainless M8 extension mounts
- Includes 20mm and 11mm spacers, 2AN ORB plugs and billet injector seats
Pairs Well With
- Radium Engineering Fuel Rail (Top Feed Primary) - Mazda (13B)
- Radium Engineering FPR/FPD Adaptor - Subaru / Nissan / Mazda RX-7 (FC/FD) - 8AN ORB 11mm Bore
- Radium Engineering Fuel Hanger Surge Tank - Mazda RX-7 (FD3S)
- Radium Engineering Fuel Filter Mount - Mazda RX-7 (FD3S)
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Years | Engine / Notes |
|---|---|---|---|---|
| Mazda | RX-7 | FD3S | 1992-2002 | 13B-REW – secondary injectors |
Product
- Brand
- Radium Engineering
- Finish
- Black anodised
- Part number(s)
- 20-0447
Details
- Product
- Top feed conversion fuel rail – secondary
- Engine
- Mazda 13B-REW
- Ports
- 3 x 8AN ORB
- Injector type
- Top feed, 14mm O-rings, 60mm height
- Confirmed injectors
- Injector Dynamics ID1050-XDS / ID1300-XDS / ID1700-XDS / ID2600-XDS (-60-14-14)
- Manifold compatibility
- OEM 2-port, Xcessive Manufacturing 4-port, Elite Rotary Shop 4-port
- Fuel compatibility
- All popular fuels incl. E85
Contents
Black anodized aluminum fuel rail
14mm billet injector seats with FKM O-rings
20mm and 11mm thermal insulating spacers
Stainless steel mounting hardware and M8 extension mounts
2AN ORB plugs for unused ports

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