Description This KGParts Primary Fuel Rail can be used on any Mazda 13b Fuel Injected Engine such as RX-7 13B-T 13B-REW Cosmo 13B-RE 13b MSP (with 14mm non OEM Injectors) Rail is designed to accommodate 60mm tall, 14mm top feed o-ring style injectors, it will not work with 11mm Japanese style injectors. Though the New KGParts RX-8 Specific Primary Rail may be your best option in this case. The rail is tapped at both ends to accept 3/8 NPT fittings. This is for the primary fuel rail only. Optional injector spacers for sealing the top feed injectors in engine block are sold separately. You may need need Tap In Primary Injector Spacers (PIMS) depending on your specific Injectors. These are available separately. Please Note that the FD/COSMO PIMS are not the same as those used in the FC engines, If your installing this rail on an FC please make sure you purchase the FC Specific Primary Injector Spacers. These spacers size down the opening to accept the common 14mm injector O-Rings found on most aftermarket fuel injectors.
