This Holley line of high output mechanical fuel pumps has been totally redesigned. They're lighter and more reliable, but put out the same great performance that's made them the number one choice of those who know what the Heart and Soul of Performance is all about. The 110 GPH and 130+ GPH pumps are now joined by an awesome race volume design that puts all competitors to shame. Features High output fuel flow Flows 130+ GPH (free flow) Shutoff pressure pre-set from 7-1/2 - 9 PSI Heavy duty construction for continuous high RPM operation Redesigned high flow valves always ensure adequate fuel delivery Inlet and outlet tapped for 3/8" NPT Fuel body casting can be rotated to accommodate various plumbing situations Fuel pressure regulator is required. Recommend Holley HLY12-704Pit Stop USA offers Holley BB Chevy Mechanical Fuel Pump 12-454-13 at low everyday prices. Be sure to check out all of our products from Holley Performance Products including Holley Performance Products Big Block Chevy Fuel Pumps.