Aluminum Water Pump compatible for Chevy 283-400 V8 1955-1985 SI-AT63052 High Flow

ApplicationFor Small Block compatible for Chevy 283, 305, 327, 350, 383, 400 engines For SB compatible for Chevy 283-350 V8 Passenger Cars 1955-1968 For Corvettes with 350 V8 Engines 1955-1970 For Light Duty Trucks with 350 V8 Engines 1955-1972 For all SB compatible for Chevy blocks up to 1985OE/Part numberSI-AT63052,K71004SpecificationType:Engine Water Pump Drive Type:Belt Driven Fitment Type : Direct Replacement Pilot: 5/8" Side Port: 1/2" NPT Pulley Flange: Dual Bolt Pattern Surface Finish: Satin Material: AluminumFeatureThis high volume pump will flow up to 40% more than stock pumps and it will dissipate heat better than the regular OEM iron pumps. This water pump is lighter and features high quality roller bearings, custom machined impeller for maximum water flow, and reduced cavitation at high RPMs. This is the short style water pump, it must be used with pulley and brackets made for short water pumps. Mechanical water pump with a 5/8" pilot and 1/2" NPT side port Bigger pump impeller & Larger cavity size Standard rotation Includes gaskets High quality roller bearings Perfect for racing or direct factory replacementNote100% brand new, Never been tried or installed No instructions are supplied.Please consult with a qualified mechanic before attempting installation!