This Chevrolet Performance 19435100 LS376/480 Crate Engine is a production LS3 found in the Chevy C6 Corvette and the Chevy SS with a Chevrolet Performance Hot Cam (88958753) added, bringing the power to 495 horsepower and 473 lb. ft. of torque. That’s nearly a 14 percent power increase over the production engine.

Chevrolet Performance 19435100 LS376/480 Crate Engine Specs:

• Engine Type: LS-Series Gen IV Small-Block V-8
• Displacement: 376ci (6.2L)
• Bore x Stroke: 4.065' x 3.622' (103.25 x 92mm)
• Block: Cast aluminum with six-bolt, cross-bolted main caps
• Crankshaft: Nodular iron
• Connecting Rods: Powdered metal
• Pistons: Hypereutectic aluminum
• Camshaft Type: Hydraulic roller
• Valve Lift: .525' intake / .525' exhaust
• Camshaft Duration (@.050 in.): 219° intake / 228° exhaust
• Cylinder Heads: Aluminum L92-style port; 'as cast' with 68cc chambers
• Valve Size: 2.165' intake / 1.590' exhaust
• Compression Ratio: 10.7:1
• Rocker Arms: Investment-cast, roller trunnion
• Rocker Arm Ratio: 1.7:1
• Recommended Fuel: Premium pump (92-octane)
• Maximum Recommended rpm: 6600
• Reluctor Wheel: 58X
• Balanced: Internal

Chevrolet Performance 19435100 LS376/480 Crate Engine Notes:

• Assembly does NOT include any electronics, flywheel, or exhaust manifolds
• Requires LS376/480 Controller Kit 19354330 The Kit includes an electronic throttle pedal, which is required for throttle input to the ECU (sold separately)
• Includes Chevy SS mid-wet sump oil pan installed
• Intended for pre-1976 street vehicles or any off-road vehicle
• Not intended for marine applications
• Front-end accessory drive kits are available in two configurations

Engine Break-In Procedure

Use only engine oil that meets dexos1 specifications. For track events or competitive driving, use Mobil 1 15W-50 engine oil. Fill the engine with oil and follow the proper engine priming procedure.  Also check and fill as required any other necessary fluids such as coolant, power steering fluid, etc.

Start the engine and listen for any unusual noises. If no unusual noises are noted, run the engine at approximately 1000 RPM until normal operating temperature is reached.  The engine should be driven at varying loads and conditions for the first 30 miles or one hour without wide open throttle (WOT) or sustained high RPM accelerations.  Run five or six medium throttle (50%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear. Run two or three hard throttle (WOT 100%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear. 

Change the engine oil and filter. Inspect the oil and the oil filter for any foreign particles to ensure that the engine is functioning properly.  Drive the next 500 miles (12 to 15 engine hours) under normal conditions. Do not run the engine at its maximum rated engine speed. Also, do not expose the engine to extended periods of high load.  Change the oil and filter again, and inspect the oil and oil filter for any foreign particles to ensure that the engine is functioning properly.

19435100 supersedes 19434638, 19432416, 19419864, 19370411

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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