Core Size: 19.4'' x 21.6'' x 2.44'' Thickness, Overall Size: 27''x 26.2'' x 7' T Top Hose Location & Size: Center 1.5 inch, Bottom Hose Location & Size: Passenger 1.77 inch Transmission Oil Cooler: 26x205xG1/4(Z) 100% brazed aluminum core, TIG-welded to aluminum end tanks for superior durability and longevity Shroud fan provides protection and extra heat heat dissipation for the radiator Radiator Specifics: Condition: 100% Brand New Material: Aircraft AA5052 grade aluminum tank & core Row: 4 Row Core Size: 19.4'' x 21.6'' x 2.44'' Thickness Overall Size: 27''x 26.2'' x 7' T Top Hose Location & Size: Center 1.5 inch Bottom Hose Location & Size: Passenger 1.77 inch Transmission Oil Cooler: 26x205xG1/4(Z) CNC Precision Machined Radiator Cap OEM Style Brass Petcock Drain Fan Spec: Maximum Fan CFM: 2000±200 Fan Diameter (in): 16.050 inches Thickness (in): 2.790 inches Number of Blades: 10 blades Maximum Fan RPM: 2,250 rpm Blade Material: Plastic Amp Draw: 12.70 amps Includes the Mounting Tabs for an Easy Zip Tie Installation Thermostat Relay Kit Instructions: Activates by grounding electric fans at preset temperature. 180'F/165'F turn on/off temperature. RED + connect directly to battery. WHITE wire to ignition switch power source. BLACK goes to thermos switch. BLUE wire goes to the Fans. This Radiator Compatible with: 1955-1959 Chevy /GMC Truck Pickup 1955-1959 Chevy 3100 3200 3400 3500 3600 3800 1955-1959 Chevy Truck Pickup Suburban Panel 1955-1958 Chevy / GMC 100 /150 Truck Pickup L6/V8 PLS check more detailed vehicle information by AmazonConfirmedFit to confirm this radiator fit your vehicle before you order. Please Notes: HKAUTOPART offering a brand new professional Aluminum Radiator at an best price. We warranty that all our products are made of the best materials and advanced manufacture technique.We also offer you 100% risk-free satisfaction guarantee to let you buy with confidence; If you are not satisfied with the quality of the product, please contact us in time, we will fully-refund you after item returned. If you have any problem(Before payment or after payment), please feel free to contact us via email. We will try our best to solve your problem as soon as possible. Shroud+Fans The fan and the fan shroud effectively drive the heat over and out the engine compartment rather than thrusting it into the front of the engine. The fan shroud basically houses the fan blades securing it in place and keeping it from damaging the other engine components that may disturb the smooth and even operation of the engine. With excellent operating temperature management, allowable levels of engine temperature are stabilized. Investing in proper maintenance though will considerably benefit the ride and driving quality in maintaining the ideal working conditions of the engine.