638 HP LS9 engine crate featuring a 6.2L supercharged Gen IV LS-series V8 rated at 638 horsepower and 604 lb-ft of torque. Originally developed for the C6 Corvette ZR1, the LS9 combines a factory-integrated Eaton supercharger with a reinforced aluminum block and performance-focused internal components for high-output street, restomod, pro-touring, and custom applications.
The LS9 crate engine uses a 2.3L Eaton four-lobe Roots-type supercharger operating at 10.5 psi of boost. Its internal construction includes a forged steel crankshaft, forged aluminum pistons, titanium connecting rods, cross-bolted main caps, and aluminum cylinder heads. The dry-sump lubrication system is designed for use with an external oil tank.
Key Specifications
- Engine Family: Gen IV LS-Series Small-Block V8
- Displacement: 6.2L / 376 cubic inches
- Horsepower: 638 HP @ 6,500 RPM
- Torque: 604 lb-ft @ 3,800 RPM
- Supercharger: Eaton 2.3L four-lobe Roots-type
- Boost: 10.5 PSI
- Compression Ratio: 9.1:1
- Bore x Stroke: 4.065 in. x 3.622 in.
- Block: Cast aluminum with six-bolt cross-bolted steel main caps
- Cylinder Heads: Rotocast 356-T6 aluminum
- Valvetrain: Titanium intake valves and hollow-stem exhaust valves
- Connecting Rods: Forged titanium I-beam
- Lubrication: Dry-sump system requiring an external oil tank
Package Includes
- Complete LS9 6.2L supercharged engine assembly
- Integrated Eaton supercharger with intercooler and throttle body
- High-flow fuel rails and injectors
- Forged steel crankshaft
- Forged pistons
- Titanium connecting rods
- Dry-sump oil pan and integrated scavenge pump
- Ignition coils, spark plug wires, and valve covers
- Water pump
- Harmonic balancer
- Accessory drive brackets
The LS9 crate engine is suited to compatible high-performance restomods, pro-touring vehicles, custom street builds, and other applications requiring a factory-based supercharged 6.2L LS powertrain. Confirm accessory, oiling, fuel, electrical, cooling, and drivetrain requirements for the specific vehicle before installation.
