Radium Top Feed Conversion Primary Fuel Rail - Mazda RX-7 FD/Cosmo (13B)The Radium Engineering high flow primary fuel rail is for the 13B RE and 13B REW rotary engine found in the 1990 1995 Mazda Eunos Cosmo and 1992 2002 Mazda RX7 FD3S. The aluminum fuel rail is anodized black for compatibility with all popular fuel types including E85. Manufactured with a large internal bore, the fuel rail can support all necessary engine power requirements. There are three 8AN ORB ports. The extra center port allows additional fuel
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