Radium Fuel Rail

Click here to download installation instructions (PDF)

This fuel rail is compatible with most Mazda 1.8L DOHC BP engines:
1994-1997 Mazda Miata
1999-2005 Mazda MX-5 
1994-1996 Eunos Roadster

Installation on a 94-97 Miata shown below.

Shown below, there are provisions to support both mounting point variations. 

The rail is CNC machined from extruded 6063 aluminum, black anodized, and laser etched for a high quality surface finish. All 3 ports are machined with 8AN ORB (3/4-16 female) threads. For a list of 8AN ORB adapter fittings, go HERE. 

Like the OEM fuel rails, the injector bores are 11mm ID so factory injectors are permitted. This kit is compatible with all fuel types including popular alcohol mixtures such as E85. The OEM plastic spacers are reused and Phenolic washers are included to thermally insulate the fuel rail from the aluminum intake manifold.  

CONFIGURATION

20-0369 Mazda MX-5 Fuel Rail
This kit only includes the fuel rail and the mounting hardware making it ideal for custom applications.

Included:
-Black Anodized Laser Etched Aluminum Fuel Rail
-Stainless Steel Mounting Hardware
-Phenolic Thermal Insulating Washers

20-0422 Fuel Rail Plumbing Kit, 94-97 Mazda MX-5 
This add-on kit permits a bolt-on plug and play replacement for the OEM system. The OEM fuel pressure regulator is retained and the fuel feed and fuel return hoses are replaced.

INCLUDED:
14-0294 8AN ORB to 5/16" Barb Fitting
20-0301 8AN ORB to OEM FPR Fitting
14-0150 8AN ORB Plug
Vapor Shield 5/16" Fuel Hose 

20-0423 Fuel Rail Plumbing Kit, 99-05 Mazda MX-5 
This add-on kit permits a bolt-on plug and play replacement for the OEM system. The OEM fuel pulse damper and fuel feed hose are retained.

INCLUDED:
20-0301 8AN ORB to OEM FPD Adapter Fitting
14-0151 8AN ORB to 6AN Male Fitting
14-0268 6AN 90 Degree Female Coupler
14-0146 SAE Quick Connect Fitting
14-0150 8AN ORB Plug