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Whether you're simply upgrading injectors on your stock injectors in your FD RX7, or carrying out an engine conversion into an earlier model car with a REW 13B, this Radium Engineering Primary & Secondary Fuel Rail Kit will help you get the job done neatly and most importantly, correctly.

This high-flow fuel rail set has been designed for the 13B-REW rotary engines with a large internal bore to support both stock & high-horsepower applications and supplies you with everything you need to set up with your chosen injectors and go. Each rail is CNC machined from billet 6061 aluminium and anodized black for sleek looks and full compatibility with all popular fuel types including ethanol E85.


A unique feature of the Radium 13B Fuel Rail Set is that the secondary rail features 4 injector ports as standard, making this kit compatible with the OEM FD RX7 13B-REW manifold as well as aftermarket 4-injector setups including the Elite & Xcessive lower intakes with additional adaptors (available separately)*. Installation on an OEM intake simply requires the use of the two supplied 2AN orb plugs to block off the two centre injector ports.

NOTE:  If fitting those rail set with factory FD intake you will require an ACV Delete Plate to remove the air control valve - this is available separately if required (See extras tab). Also, if using an Elite Rotary Shop 4-port intake manifold (as shown below), 2 extra injector seats are required & can be provided with injector adaptors to suit Bosch 2000cc injectors. For the Xcessive Manufacturing 4-port intake manifold, the included 11mm insulating spacers will be used.

Both the primary & secondary each feature three 8AN ORB ports off the shelf, with the extra centre port supporting additional fuel system accessories such as the OEM fuel temperature sensor. If not required they can simply be blocked with an in-hex blanking plug which can be purchased separately (see extras tab) 

What's Included:

- Primary Fuel Rail
- Secondary Fuel Rail
- 4x 11mm Insulating Spacers & Washers
- 2x 20mm Insulating Spacers & Washers
- 2x Stainless Extension Mounts
- 4x Stainless Allen Head Bolts
- 4x 14mm Injector Seats
- 2x 6AN Fittings
- 2x 8AN Fittings
- 2x 8AN In-Hex Plugs


- 13B-REW (FD3S 13B)

- Aftermarket 4-port Intakes (Elite & Xcessive)*Additional adaptors & Seats required (See Extras Tab)

The Radium Engineering Installation Guide can be found HERE

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