LS9 LONG-BLOCK

REBATE DETAILS

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QUALITY PARTS.
HIGH-CALIBER BUILD.

Offer Valid 1/1/24 to 12/31/24

$250 rebate^* on the purchase of a Chevrolet Performance Transmission within 180 days of the purchase of any Chevrolet Performance Crate Engine^**. Rebate amount dependent on the package purchased.

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A factory foundation for boost

As the foundation for the supercharged engine that powered the 2009-13 Corvette ZR1, our LS9 is a long-block built for boost – delivered without the supercharger or front-end accessory drive system, allowing the builder to finish the engine with the power adder of his or her choice. It is rated for 12 lbs. of boost.

PART NO. 12624262

Chevrolet Performance Animated speedometer

638 HP @6500 RPM

604 LB-FT @ 3800 RPM

Building boost

The assembly includes a forged rotating assembly (including lightweight titanium connecting rods), rotocast aluminum cylinder heads with titanium intake valves and stainless hollow exhaust valves, multiple engine sensors and six ignition coils. It also includes a dry-sump oil pan, which requires the builder to add an external oil tank.

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Side view of Chevrolet Performance LS9 Long-Block

LS9 Long-Block Tech Specs

Engine Type: LS-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: Cast-aluminum with six-bolt, cross-bolted main caps
Crankshaft (P/N 12641693): Forged steel with nine-bolt flange
Connecting Rods (P/N 12624231): Forged titanium
Pistions (P/N 19180414): Forged alumium
Camshaft Type (P/N 12638427): Hydraulic roller
Valve Lift (in.): .562 intake / .558 exhaust
Cylinder Heads (P/N 12621774): Aluminum L92-style ports; “as cast” with 68-cc chambers
Valve Size (in.): 2.160 titanium intake / 1.590; hollow, sodium-filled exhaust
Compression Ratio: 9.1:1
Rocker Arms (P/N 12696105 int.): Investment-cast, roller trunnion
Rocker Arms (P/N 12681275 exh.): Investment-cast, roller trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Premium pump
Maximum recommend rpm: 6600
Reluctor Wheel: 58X
Balanced: Internal