LSX376-B15 (6.2L) In Stock Ready To Ship

Built for Boost. Engineered for Extreme Performance.

The LSX376-B15 6.2L Crate Engine is the ultimate foundation for high-horsepower turbocharged and supercharged builds. Factory-rated at 473 horsepower and 444 lb-ft of torque, this Chevrolet Performance LSX engine is purpose-built with a heavy-duty cast-iron LSX block and premium forged internals capable of supporting up to 15 psi of boost, making it an ideal choice for street, strip, and competition applications.

Unlike conventional LS engines, the LSX376-B15 is engineered to withstand extreme cylinder pressures while maintaining exceptional durability. Its reinforced LSX cast-iron block features six-bolt, cross-bolted main caps and six-bolt cylinder head mounting for superior strength under high-boost conditions. Combined with a forged steel crankshaft, forged connecting rods, and forged aluminum pistons, this engine is built to handle serious horsepower upgrades.

Designed for High-Horsepower Builds

Whether you’re building a drag car, pro-touring machine, street rod, or custom performance vehicle, the LSX376-B15 provides the strength and reliability needed for demanding applications. The forged rotating assembly and reinforced LSX block make it an outstanding choice for enthusiasts planning significant horsepower increases through forced induction.

Its robust construction also makes it a favorite among professional engine builders looking for a dependable foundation capable of supporting well beyond its factory power rating with the proper supporting components and tuning.

Why Choose the LSX376-B15?

• Engineered specifically for turbocharged and supercharged applications
• Heavy-duty LSX cast-iron block for exceptional durability
• Premium forged internal components
• Factory-built Chevrolet Performance crate engine
• Ideal for high-performance street, race, and custom engine swap projects
• Proven platform for building 700+ HP combinations with appropriate supporting modifications

Take your performance build to the next level with the LSX376-B15 6.2L Crate Engine—a boost-ready powerhouse designed to deliver exceptional strength, reliability, and unlimited performance potential.

Engine Type:	LSX-Series Gen IV Small-Block V-8
Displacement (cu in):	376 (6.2L)
Bore x Stroke (in):	4.065 x 3.622 (103.25 x 92 mm)
Block (P/N 19417352):	LSX cast iron with 6-bolt, cross-bolted main caps
Crankshaft (P/N 12603616)):	Forged steel
Connecting Rods (P/N 12604857):	Forged powder metal
Pistons (P/N 19259381):	Forged aluminum
Camshaft Type (P/N 12638426):	Hydraulic roller
Valve Lift (in):	.560 intake / .555 exhaust
Camshaft Duration (@.050 in):	210° intake / 230° exhaust
Cylinder Heads (P/N 19419187):	LSX-LS3 rectangular port; with “as cast” 68cc chambers and 6-bolt attachment
Valve Size (in):	2.160 intake / 1.550 exhaust
Compression Ratio:	9.0:1
Rocker Arms (P/N 12669995 int):	Investment-cast, roller trunnion
Rocker Arms (P/N 12681275 exh):	Investment-cast, roller trunnion
Rocker Arm Ratio:	1.7:1
Recommended Fuel:	Regular pump
Maximum Recommended rpm:	6,600
Reluctor Wheel:	58x
Balanced:	Internal