Chevrolet Performance 19434636 GM LS3 6.2L Crate Engine, 430 HP

As the standard engine in the fifth-generation Camaro SS and C6 Corvette, the high-revving, deep-breathing LS3 6.2L is poised to go down in history as one of Chevrolet’s best and most versatile engines.

Modern Muscle
The LS3 is filled with components designed for high performance and longevity. The aluminum block is filled with a sturdy reciprocating assembly that combines with L92-type rectangular-port heads to deliver a 10.7:1 compression ratio.

LS3 Tech Specs
Part Number: 19434636
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 (P/N 12623967): Cast-aluminum with six-bolt, cross-bolted main caps
Crankshaft (P/N 12597569): Nodular iron
Connecting Rods (P/N 12607475): Powdered metal
Pistons (P/N 19207287): Hypereutectic aluminum
Camshaft Type (P/N 12603844): Hydraulic roller
Valve Lift (in.): .551 intake / .522 exhaust
Camshaft Duration (@.050 in.): 204° intake / 211° exhaust
Cylinder Heads (P/N 12629063): Aluminum L92-style port; “as cast” with 68-cc chambers
Valve Size (in.): 2.165 intake / 1.590 exhaust
Compression Ratio: 10.7:1
Rocker Arms (P/N 12569167 int): Investment-cast, roller trunnion
Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Premium pump
Maximum Recommended rpm: 6600
Reluctor Wheel: 58X
Balanced: Internal