All Fuel rails are CNC billet aluminum, large non-restrictive bore maintains maximum pressure and fuel volume at each injector decreasing the chance of fuel cavitations. Maxi threads used at each connection point and hand honed for maximum smoothness of run surfaces. All fuel rails accept 6 or 8 an fittings. All fuel rails come with CNC billet fittings, Fuel rails can be fitted with stock pressure regulator or aftermarket, Large Bore decreases fuel cavitations, Hand honed for maximum smoothness insuring low turbulence, 45% larger fuel capacity above OEM Fuel Rail & Manufactured in house @ Venom Performance. Offered in red, blue and silver.