This aluminum radiator is designed to provide maximum cooling efficiency to prevent premature engine failure. Its light-weight, and high-heat transferring aluminum features a tube and fin design that, dramatically increases surface area that enables the heat to dissipate more efficiently. This Aluminum Radiator is at least 40% more efficient than stock ones. Most importantly, it has a much higher capacity for coolant than stock ones, which means that your cooling system will be more efficient and will be more resistant to temperature surges in racing applications. This aluminum radiator is designed to provide maximum cooling efficiency to prevent premature engine failure. Its light-weight, and high-heat transferring aluminum features a tube and fin design that, dramatically increases surface area that enables the heat to dissipate more efficiently. This Aluminum Radiator is at least 40% more efficient than stock ones. Most importantly, it has a much higher capacity for coolant than stock ones, which means that your cooling system will be more efficient and will be more resistant to temperature surges in racing applications. Fitment 2 GMC K15/K1500 SUBURBAN 1968-1972GMC K25/K2500 K35/K3500 PICKUP 1968-1972Fits L6 V6 V8 Models with 28.25" Wide Core RGMC C15/C1500 C25/C2500 PICKUP 1968-1972GMC C15/C1500 C25/C2500 SUBURBAN 1968-1972GMC C35/C3500 PICKUP 1968-1972GMC G15/G1500 VAN 1969-1971GMC G25/G2500 VAN 1970-1971GMC G35/G3500 VAN 1971GMC JIMMY 1970-1972 Description 100% Brand new and never been used.Made of High Quality Full T-6061 Aluminum ConstructionStronger and Higher Capacity for Coolant than Stock Units3-Row Light-Weight Racing DesignCore Size: 28.25" x 15.75" x 2.00"Inlet/Outlet: 1.625" / 1.75"Direct Bolt-On OE Fitment or ReplacementImproves Cooling by 35% to 45% TemperatureProfessional Installation is Highly RecommendedNo Instruction Included Package includes 1X Aluminum Racing Radiator Durable Material Made of High Quality Full T-6061 Aluminum Construction;Stronger and Higher Capacity for Coolant than Stock Units Racing Design 3 -Row Light-Weight Racing Design,Stronger and Higher Capacity for Coolant than Stock Units,Improves Cooling by 35% to 45% Temperature. Great Performance Its light-weight, and high-heat transferring aluminum features a tube and fin design that, dramatically increases surface area that enables the heat to dissipate more efficiently.