Radium Fuel Rail KitManufactured with 0. 6" large internal bores, the Radium Engineering fuel rails can support all necessary engine power requirements. The 2 end ports are 3 4" 16 threaded (8AN ORB). The upper area of the engine is very narrow so the 2 top ports are 9 16" 18 threaded (6AN ORB). Stainless steel mounting tabs (shown) are included for superior strength. The OEM fuel injectors are compatible with these fuel rails. The machined ports are compatible with 11mm
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