Chevrolet Performance LS376/525 Crate Engine 19419890


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.): 226° intake / 236° 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
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, inspect the oil and oil filter for any foreign particles to ensure that the engine is functioning properly.
19434642 supersedes 19432418, 19419866, 19370413

Part Type
Product Line
Chevrolet Performance LS3 LS376/525 6.2L 525HP Crate Engine
Engine Block Material
Cylinder Head Material
Engine Make/Size
Compression Ratio
Flexplate Included
Engine Displacement
Intake Manifold Type
Fuel Injection
Engine Type
Replacement Engine
Shipping Weight:
Package Height:
Package Depth:
Package Width:

SKU: chevrolet-performance-ls376-525-crate-engine-1949890 Category:


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