500 CFM - 2300 - Hard Core Gray - Gasoline;All aluminum construction; Calibrated to compensate for unique engine loads found on boats; Factory preset electric choke for easy startups; Hard Core Gray finish for corrosion protection in marine environments; Single feed fuel inlet for easy installation; J-Style Vent Tubes; Throttle shafts are PTFE coated for corrosion protection; Meets Coast Guard Specifications; 100% wet-flow tested by Holley technicians to assure it arrives ready to run!;