Description: Total towing performance and value for your truck. These GM Performance Parts HT502 engines offer tremendous value in a big block crate engine. They're based on the Gen VI 4-bolt mains with 1-piece rear main seal blocks.Features include:* Approximately 8.75:1 compression* 338 hp at 4,600 rpm* 512 ft.-lbs. of torque at 2,800 rpm* 4.000 in. stroke, forged steel, externally balanced crankshafts*(more)

Description: Total towing performance and value for your truck. These GM Performance Parts HT502 engines offer tremendous value in a big block crate engine. They're based on the Gen VI 4-bolt mains with 1-piece rear main seal blocks.Features include:* Approximately 8.75:1 compression* 338 hp at 4,600 rpm* 512 ft.-lbs. of torque at 2,800 rpm* 4.000 in. stroke, forged steel, externally balanced crankshafts* Forged steel connecting rods* Forged aluminum pistons* Hydraulic roller camshafts with .480 in. intake lift, .483 in. exhaust lift, 204 intake and 209 exhaust duration at .050 in., and 112 degree lobe centerline* Cast iron cylinder heads with oval port 118cc combustion chambers* 275cc intake runner volume with 2.07 in. intake valves and 1.73 in. exhaust* Configured for 3/8 in. thread 7/16 in. shank rocker arm studs* Stamped steel, self-aligning, 1.7:1 ratio rocker arms* AC Delco spark plugs* Oil pans* Black powdercoated aluminum valve covers and timing covers* 8 in. harmonic balancers* 14 in. automatic flexplates (minimize)