This 383 delivers Big-Block-style performance. Using the sturdy 383 bottom end including four-bolt mains, a forged crankshaft and heavy duty rods, we topped it with Aeroflow Aluminium cylinder heads to enable 420hp and 440 lb-ft of torque. The Aeroflow heads use high-flow 200cc intake runners, 2.02/1.60-inch valves & 64cc combustion chamber design to process air quickly and efficiently. A roller camshaft with more than 0.500-inch lift on both the intake and exhaust sides helps this potent engine maximise airflow. It is complemented by friction reducing aluminium roller rocker arms. This crate engine package includes; Holley 750cfm vacuum secondary carburettor, Performer Air Gap manifold, MSD Distributor, Flexplate and Harmonic Balancer. With this 383 crate engine, you get the best of both worlds Big-Block power with Small-Block efficiency.

• Engine Type: Chevy Small Block V8
• Displacement (cu in): 383
• Bore x stroke (in): 4.00 x 3.80
• Block: Cast iron with 4 bolt main caps
• Crankshaft: 4340 Forged steel
• Connecting Rods: Powdered Metal Steel
• Pistons: Hypereutectic
• Camshaft Type: Hydraulic Roller
• Camshaft lift (in): .509 intake / .528 exhaust
• Camshaft Duration (@.050 in): 222° intake / 230° exhaust
• Cylinder Heads: Aeroflow 200cc Intake, 64cc Chamber
• Valve size (in): 2.05 intake / 1.60 exhaust
• Compression ratio: 9.4:1
• Rocker arms: 1.5:1 Aluminium Roller Tip
• Edelbrock Air Gap Dual Plane intake manifold
• 750cfm Vac secondary Holley 4 barrel carburettor
• 14"x3" chrome Air Filter
• 8" Harmonic Balancer
• MSD Distributor
• MSD Ignition Lead Set
• 153 tooth Flexplate
• Oil filter
• Thermostat and Housing
• Aluminium Valve Covers

(Parts and engine specs may vary when engines are assembled due to availability)

Product Reviews for GM12498772-AF - ROCKET