Kenworth Truck Company now offers Caterpillar C15 600 hp and 625 hp engines on the Kenworth T800 high hood model. Caterpillar's C15 600 hp engine provides 1,850 lb-ft of torque at 1,200 rpm and the C15 625 hp engine provides 2,050 lb.-ft. of torque at 1,200 rpm. The Kenworth T800 high hood model with the C15 600 hp or 625 hp engine requires a manual transmission and Kenworth's 1,430 sq.-in. radiator.