PORTS AND FITTINGS This fuel rail features four 8AN ORB ports, two on the bottom and one at each end. O-ring style fittings must be used in these ports. No fittings are included with this fuel rail and must be purchased separately. 8AN ORB Adapter Fittings 8AN ORB Direct Mount Regulators 8AN ORB Fuel Pulse Dampers Fuel Pressure Gauge Adapters Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide. FUEL INJECTOR COMPATIBILITY This fuel rail is compatible with factory or OEM equivalent fuel injectors. If upgrading fuel injectors, consult your aftermarket injector supplier for details. Radium Engineering cannot specify any further injector dimensions other than stating ‘OEM equivalent’. INCLUDED IN THE KIT -Black Anodized Laser Etched Fuel Rail-Black Anodized Mounting Feet-Stainless Steel Mounting Hardware-Thermal Insulating Spacers Instruction PDF