19355721 HT383E Performance Crate Engine

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Item #: 19355721
Reg. Price: $6,164.98
Our Price: $4,981.98


19355721 Chevrolet Performance HT383E Crate Engine Replaces 19332531

323 Horsepower:
HT 383E High Performance replacment for 1996-1999 Light Trucks 350R engines

Emissions-Legal Stroker for Trucks

Chevrolet Performance’s HT383E crate engine is an affordable and more powerful emissions-legal direct

replacement for the tired 350 engine in your 1996-99 full-size GM truck or SUV. The larger displacement delivers

up to 10 percent more horsepower and more usable torque for effortless towing. It is extra power you won’t get

with a stock-type rebuild or reconditioned used engine.

Like our standard HT383, this crate engine starts with a brand-new 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 distributor, water pump and other

components that would need to be replaced during a rebuild.

The HT383E is designed to replace the L31 5.7-liter 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.



Part Number: 19332531

Engine Type: Chevy Small-Block V-8

Displacement (cu in): 383

Bore x Stroke (in): 4.000 x 3.800

Block (P/N 88962516): Cast-iron with 4-bolt main caps

Crankshaft (P/N 12489436): 4340 forged steel

Connecting Rods (P/N 12497624): Heavy-duty PM steel

Pistons (P/N 12499103): Hypereutectic aluminum

Camshaft Type (P/N 14097395): Hydraulic roller

Camshaft Lift (in): .431 intake / .451 exhaust

Camshaft Duration (@.050 in): 196° intake / 206° exhaust

Cylinder Heads (P/N 12558060): Vortec iron; 64cc chambers

Valve Size (in): 1.940 intake / 1.500 exhaust

Compression Ratio: 9.1:1

Rocker Arms (P/N 10089648): Stamped steel

Rocker Arm Ratio: 1.5:1

Water Pump (P/N 88894341): Cast-iron

Recommended Fuel: 87 octane

Maximum Recommended rpm: 5,000

Balanced: External




 • Requires the reuse of the stock intake manifold, wiring harness, and fuel injection system 

• Due to calibration variances between half, three-quarter- and one-ton vehicles, this engine is designed for half-ton trucks and SUVs only 

• This engine is not emissions-legal in CA or states that have adopted CA emissions regulations 

• Comes with 12.75-inch externally balanced 153-tooth automatic transmission flexplate #14088765. For 14" use P/N 14088761 flexplate. 
   Requires externally balanced flywheel, see flywheel charts for correct size for manual transmission. Use # 14088765 for 12.75" or #14088761 for 14" 

• Has right-side dipstick  

• Not available as a Partial  

• Performance recalibration of ECU will significantly increase torque and horsepower

Note: The 323HP is based on carb set up. If it is going to be even close, it will need a calibration

GM Performance Parts has released the HT383E CID V8.
This engine produces 323 hp and 444 ft-lbs of torque.
This new engine is emissions legal (except as noted below) due to its similarities to the original production engine and its use of the stock fuel injection system released from 1996 - 1999 in the full-size trucks.

Due to the increase in cubic inches, this engine translates into more power for your truck. Especially when you need more! It's easily bolted up, plugged in and driven home.

In most states this will be an emissions legal OE upgrade. However, the engine will not meet the emissions requirements in the following states when used in the 1996 - 1999 full-size trucks.
California - not legal in any application
Connecticut - not legal in 1998 trucks rated at 6,000 lbs or less
Massachusetts - not legal in any truck rated at 6,000 lbs or less
New York - not legal in a truck rated at 6,000 lbs or less
You can check the labels on the side of the driver's door or ask your dealership service department to determine the weight rating.

Terms and Conditions
Warranty Information
GM Performance Crate Engine Start-up Instructions

Click here to download Product Information Sheet 

Service Parts Listing

Still have questions or want more information, Please call us at 847-752-6172



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