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 cylinder 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 5.7-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.

HT383E TECH SPECS:

• Engine Type: Chevy Small-Block V-8
• Displacement: 383ci
• Bore x Stroke: 4.000'' x 3.800''
• Block: Cast-iron with four-bolt main caps
• Crankshaft: 4340 forged steel
• Connecting Rods: Heavy-duty PM steel
• Pistons: Hypereutectic aluminum
• Camshaft Type: Hydraulic roller
• Camshaft Lift: .431'' intake / .451'' exhaust
• Camshaft Duration (@ .050 in): 196° intake / 206° exhaust
• Cylinder Heads: Vortec Iron; 64cc combustion chambers
• Valve Size: 1.94'' intake / 1.50'' exhaust
• Compression Ratio: 9.1:1 nominal
• Rocker Arms: Stamped steel
• Rocker Arm Ratio: 1.5:1
• Water Pump: Cast iron, long-style
• Flexplate: 12.750''; 153-tooth
• Recommended Fuel: Regular pump
• Maximum Recommended rpm: 5000
• Balanced: External

GM Warranty

JEGS EZ Kits are designed by JEGS professionals to ensure that you get all the correct parts you need.