HT383 Performance Crate Engine, 340 HP, 435 ft lbs
12499101, GM Performance HT383 Crate Engine, 340 HP, 435 ft lbs
ENGINE
Part #
12499101
Price: $4,350.00
Quantity:
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There comes a time when you may not just want more power, you may need more power. Times like when you are towing your show car or bass boat with that 1970s-and-earlier GM truck, and it just doesn’t have the low-end grunt that you need to flatten hills or make a safe pass. For those times, our engineers designed the HT (high torque) 383 with lots of cubic inches and other components to enhance the low-rpm power that you need. The GM Performance Parts HT383 has been specifically engineered for low-rpm torque, and it’s packed with durable parts that are all brand new.

Horsepower: 340 @ 4500 RPM
Torque: 435 @ 4000 RPM
Compression Ratio: 9.1:1
Block: Cast Iron, 4-Bolt Main Caps, 1-Piece Rear Seal
Crankshaft: Forged Steel, 3.800" Stroke
Heads, Chamber Size: Vortec Cast Iron, 64cc
Valves (I/E): 1.94" I / 1.50 E
Camshaft, Lift (I/E): Hydraulic Roller, 0.431" I / 0.451" E
Camshaft Duration @ 0.050" I/E: 196° Intake / 206° Exhaust
Intake Manifold: Aluminum Dual Plane
Maximum Recommended RPM: Null

Block: Cast Iron, 4 bolt
Camshaft Duration @ 0.050 in. I/E: 196 / 206
Camshaft Type, Lift in. (I/E): Hydraulic Roller, 0.431 / 0.451
Compression Ratio: 9.1:1
Crankshaft: Forged Steel, 3.800 in. Stroke
Heads, Chamber Size: Vortec Cast Iron, 64cc
Horsepower: 340 @ 4500 RPM
Intake Manifold: Aluminum Dual Plane
Torque: 435 ft/lbs @ 4000 RPM
Valves (I/E) (in.): 1.940 / 1.500


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