LSX376-B8 376ci Engine 476 HP @ 5900 RPM

Name: LSX376-B8 376ci Engine 476 HP @ 5900 RPM
Brand: CHEVROLET PERFORMANCE
SKU: 809-19432776
Price: 8777.16 USD
Availability: InStock

^$8,777¹⁶

Truck Freight

Ships on 11/06/2026

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LSX376-B8 376ci Engine

LSX376-B8 376ci Engine
Replacement for 809-19260831

476 HP @ 5900 RPM

475 ft/lbs TQ @ 4700 RPM

INSTALLATION NOTES:

Assembly does not include any electronics
Intended for pre-1976 street vehicles or any off-road vehicle
Not intended for marine applications
Requires LSX Ignition Controller (P/N 19171130) for carbureted applications
Standard LS six-bolt crank flange
Assembly shipped without intake manifold or oil pan (dust shield installed for shipment)
Recommended max boost - 8 PSI
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.

19432776 supersedes 19332312

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.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

A Factory-Built Foundation for Forced Induction!

Boost on a budget! That's what you get with the LSX376-B8. Chevrolet Performance takes the economical LSX Bowtie standard-deck block, adds blower-friendly 9.0:1 forged pistons, and combines them with the LS3's high-flow, rectangular-port heads to create an affordable foundation for supercharged and turbocharged combinations that runs on pump gas. The engine delivers exceptional air flow capability in a straight forward package even without any power adders. The LSX376 is built without an intake manifold so you can top it with a carburetor or production-style injection system or enables the installer to tailor the induction system to suit the blower or turbo system. The LSX376-B8 is designed for lower-boost applications, up to about 8 pounds. That's suitable for most supercharger and turbo kits that are designed to be used with production-based applications.

The LSX376-B8 is delivered with only a dust cover instead of an oil pan so you can order what is correct for your application. Just one more way to keep the cost down by excluding
parts you can't use. Put this great engine in a vehicle originally equipped with an LS engine to give it a stronger bottom end for forced induction, or drop it into a street rod or classic muscle car body for a modern update.

*Horsepower and torque ratings were derived by GM Engineering using a normally aspirated LSX376 with LS3 EFI system. Your power numbers may vary, based on induction system and componentry.

LSX376-B8 TECH SPECS:

Engine Type: LSX-Series Gen IV Small-Block V-8
Displacement: 376ci (6.2L)
Bore x Stroke: 4.065'' x 3.622'' (103.25mm x 92mm)
Block: LSX cast-iron with six-bolt, cross-bolted main caps
Crankshaft: Nodular iron with standard LS 6-bolt flange
Connecting Rods: Powdered metal
Pistons: Forged aluminum
Camshaft Type: Hydraulic roller
Camshaft Lift: .551'' intake / .522'' exhaust
Camshaft Duration (@.050 in.): 204° intake / 211° exhaust
Cylinder Heads: LS3 rectangular port; with ''as cast'' 68cc chambers
Valve Size: 2.160'' intake / 1.590'' exhaust
Compression Ratio: 9.0:1
Rocker Arms: Investment cast, roller trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Regular pump (87 octane)
Maximum Recommended RPM: 6600
Reluctor Wheel: 58x
Balanced: Internal

Note: Standard 24 month/50,000 mile warranty applies

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