Chevrolet Performance LS9 Long Block Crate Engine – 12624262

Experience supercharged excellence with the Chevrolet Performance LS9 Long Block Crate Engine. This legendary powerplant from the ZR1 Corvette delivers 638 horsepower and 604 lb-ft of torque through Eaton supercharger technology. The LS9 features forged internals, intercooled supercharger, and components designed for extreme performance and reliability. This long block configuration allows builders to use their own accessories. The 6.2L supercharged architecture represents the pinnacle of production LS performance. Perfect for ultimate street builds and applications demanding ZR1-level power. Factory-assembled.

**Technical Specifications:**

Engine Type: LS-Series Gen-IV Small-Block V-8
Displacement (cubic inches): 376 (6.2 L)
Bore x Stroke (inches): 4.065 x 3.622 (103.25 x 92 mm)
Engine Block: Cast aluminum with six cross-bolts
Crankshaft (P/N 12641693): Forged steel with nine-bolt flange
Connecting Rods (P/N 12624231): Forged titanium
Pistons (P/N 19180414): Forged aluminum
Camshaft Type (P/N 12638427): Hydraulic roller
Valve Lift (inches): 0.562 intake / 0.558 exhaust
Cylinder Heads (P/N 12621774): Aluminum with L92-style ports; cast “as is” with 68 cc chambers
Valve Size (inches): 2.160 titanium intake / 1.590 sodium-filled hollow exhaust
Compression Ratio: 9.1:1
Rocker Arm Lifters (P/N 12696105 intake): Investment cast, roller tip
Rocker Arm Lifters (P/N 12681275 exhaust): Investment cast, roller tip
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Premium gasoline
Maximum Recommended RPM: 6600 rpm
Position Sensor Wheel: 58X
Balanced: Internally