The Chevrolet Performance LSX376-B15 is a 376 cubic inch LS long block crate engine built on an LSX cast-iron block with an all-forged rotating assembly rated to support boost. It is rated at 473 HP in naturally aspirated form and ships as a long block without an intake manifold or accessories.
Specifications:
- Type: Long block crate engine
- Displacement: 376 cubic inch (6.2L)
- Horsepower: 473 HP at 6000 RPM
- Torque: 444 lb-ft at 5000 RPM
- Compression ratio: 9:1
- Block: LSX cast iron, 6-bolt cross-bolted main caps
- Crankshaft: Forged 4340 steel, 3.622 in stroke
- Cylinder heads: LSX-LS3 rectangle port, 68cc chambers
- Valves: 2.16 in intake / 1.55 in exhaust
- Camshaft: Hydraulic roller, 0.560 in / 0.555 in lift, 210 / 230 degrees duration
- Rotating assembly: All-forged, rated to support up to 15 psi boost
- Configuration: Long block, supplied without intake manifold or accessories
- Quantity: Each
- Part number: 19434412
Applications:
- GM LS-Series performance and engine-swap builds
- Forced-induction (supercharged or turbocharged) builds up to 15 psi boost
FAQ
How much power does the LSX376-B15 make?
It is rated at 473 HP at 6000 RPM and 444 lb-ft of torque at 5000 RPM in naturally aspirated trim.
Is the LSX376-B15 designed for boost?
Yes. It uses an all-forged rotating assembly and is rated to support up to 15 psi of boost, making it a common base for supercharged and turbocharged builds.
What is included with this crate engine?
It ships as a long block. It does not include an intake manifold or external accessories, which allows the induction system to be tailored to the application.
What block and heads are used?
It uses an LSX cast-iron block with six-bolt cross-bolted main caps and LSX-LS3 rectangle-port cylinder heads with 68cc chambers.
