Chevrolet Performance SP383 C.I.D EFI Long Block Crate Engines

Chevrolet Performance's HT383E crate engine is an affordable and more powerful direct replacement for the tired 350 engine in your 1996-99 full-size GM truck or SUV. The larger displacement delivers up to 323 hp at 4,200 rpm and a whopping 444 lbs.-ft. of torque. It's extra power you won't get with a stock-type rebuild or reconditioned used engine. Like the standard HT383, this crate engine starts with a cast iron block with four-bolt main caps, a forged steel crankshaft, a smooth hydraulic roller camshaft, and a set of iron Vortec heads. Its 9.1:1 compression ratio is perfect for regular gasoline at all altitudes and engine loads. It also includes a new water pump.

The HT383E is designed to replace the L31 5.7L engine in half-ton models of the Silverado, Suburban, Tahoe, Sierra and Yukon. Simply swap the intake manifold, throttle body, exhaust manifolds, and other accessories from the original 350. It's an emissions-legal stroker for trucks!

TECH SPECS for the Chevrolet Performance SP383 c.i.d. EFI long block crate engine:

* Engine type: Chevy small block V8
* Displacement: 383 cu. in.
* Bore x Stroke (in.): 4.005 x 3.800
* Block: Cast iron with 4-bolt main caps
* Crankshaft: 4340 forged steel
* Connecting rods: Heavy-duty PM steel
* Pistons: Hypereutectic aluminum
* Camshaft type: Hydraulic roller
* Camshaft lift (in.): .431 intake / .451 exhaust
* Camshaft duration (@.050 in.): 196° intake / 206° exhaust
* Cylinder heads: Vortec iron; 64cc chambers
* Valve size (in.): 1.940 intake / 1.500 exhaust
* Compression ratio: 9.1:1
* Rocker arms: Stamped steel
* Rocker arm ratio: 1.5:1
* Water pump: Cast-iron
* Recommended fuel: Regular pump
* Maximum recommended rpm: 5,000
* Flexplate: 12.750 in.
* Balanced: External
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