LS3 Long Block Crate Engine by Chevrolet Performance 6.2L 430 HP 19435106

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Starting with the '08 Corvette, the world was first introduced to GM's latest small block V8 creation the 6.2-liter LS3. A continuation of the industry-leading V8 engines from GM Powertrain, the LS3 kicks out 430 horsepower and 424 lb.-ft. of torque. (In the Corvette, those numbers go to 436 hp and 428 lb.-ft. of torque with the optional dual-mode exhaust system.) It's a brute of a small block with 376 ready cubes at your beck and call.

The LS series of engines from GM Powertrain have broken new ground for efficiency and performance from a pushrod platform engine. The LS3 continues the engineering breakthroughs with revised cylinder heads featuring rectangle ports borrowed from the vaunted LS7. The heads feature 63 cc combustion chambers, 2.16-inch intake valves, and 1.59-inch exhaust valves. The camshaft features an aggressive .551-inches of lift on the intake side with less overlap (than the LS2) for even greater airflow and power. Rocker arms with a 1.7:1 ratio sit on top of the heads.

In the bottom end, the aluminum 6-bolts/main block features 4.06-inch bores and 3.62-inch stroke. A nodular iron crankshaft, powdered metal rods, and aluminum pistons (10.7:1 compression ratio) round out a rev-happy short block. Red line for the LS3 comes at 6600 rpm, and you will get there very quickly.

With a high-tech GM foundation, aluminum block, and high-flowing rectangular port heads, the LS3 is the new standard in the small block world. The LS3 helps power the new Corvette to a top speed of 190 mph. What will it power you to?

Specifications:
• Power: 430 HP @ 5900 RPM, 424 ft. lbs. of torque @ 4600 RPM
• Displacement: 376 CID, 6.2L
• Bore x Stroke: 4.060” x 3.620”
• Compression Ratio: 10.7:1
• Recommended Fuel: 92 Octane
• Block: Cast Aluminum with 6 bolt cross-bolted main caps
• Crankshaft: Nodular Iron
• Connecting Rods: Powdered Metal Steel
• Pistons: Hypereutectic Aluminum
• Camshaft: Steel Hydraulic Roller Tappet
• Cam Lift: .551” Intake / .522” exhaust
• Cam Duration @ .050”: 204 deg. Intake / 211 deg. Exhaust
• Lobe Separation: N/A
• Cylinder Heads: Aluminum L92/LS3 style ports
• Combustion Chamber: 68cc
• Valves: 2.165” Intake/ 1.590” Exhaust
• Rocker Arms: Cast Roller Trunnion, 1.7:1 Ratio
• Balance: Internal
• Reluctor: 58X
• Maximum GM Recommended RPM: 6600
• GM Recommended Torque Converter Stall 2400-2800

Engine Includes:
• Fully GM assembled long block
• Oil pump, pick-up, and Camaro oil pan
• Corvette Harmonic Balancer
• Front timing cover with cam sensor
• Oil Filter
• Passenger Side RH Oil Dipstick and Tube (not included)

Note: Does not include oil dipstick tube, oil dipstick, or steam crossover tube.

Warranty: General Motors limited 2-year / 50,000 mile parts & labor warranty.

Note: New engines require priming of oiling system prior to initial start-up.