Aeroflow's Billet EFI Fuel rails feature precision machining with heavy duty mounts for high pressure applications. Aeroflow fuel rails are threaded with a -8 ORB port and have a 16.1mm (5/8") size bore. Aeroflow fuel rails are hard anodised and are available in blue, black, red and polished finishes. All billet rails are to suit 14mm (9/16") injectors. For 11mm (7/16") injectors use AF889 adapters.