110 GPH Mechanical Fuel Pump Marine Carbureted Applications Fits Big Block Chevy V8s Compatible with Gasoline HolleyHolley marine mechanical fuel pumps range from 110 Gph to 200 Gph for small and big block Chevy applications to meet the fuel demands of most engines. Holley Marine mechanical pumps are designed with a fuel fume tube to provide a safe fuel exit in the unlikely event of a diaphragm rupture. Features and Benefits: High output fuel flow Flows 110 Gph free flow Shutoff pressure pre set from 6. 5 to 8 psi Fuel pressure regulator is not required Heavy duty