The Radium Engineering high flow secondary fuel rail is for the OEM lower intake manifold found on the Mazda 20B-REW rotary engine. 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. Thethree 8AN ORB ports are compatible with these fittingsHERE.The extra center port allows additional fuel system accessories such as the OEM fuel temperature sensor (using14-0421shown below), a pressure transducer,Radium fuel pulse damper, etc.