GM Performance LS3 6.2L 376/430 HP Long Block from GM Performance Part#19432422

Description

GM Performance LS3 6.2L 376/430 HP Long Block New from GM Performance Part#19432422                                                                      OLD PART#19420382
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 beckon 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.
Specifications:
Engine Type:
LS-Series Gen IV Small-Block V-8
Displacement:
376 ci (6.2L)
Bore x Stroke:
4.065 x 3.622 in. (103.250 x 92 mm)
Block:
Cast-aluminum with six-bolt, cross-bolted main caps
Crankshaft:
Nodular iron
Connecting Rods:
Powdered metal
Pistons:
Hypereutectic aluminum
Camshaft Type:
Hydraulic roller
Valve Lift:
.551 in. intake / .522 in. exhaust
Camshaft Duration (@.050 in.):
204-degree intake / 211-degree exhaust
Cylinder Heads:
L92 style port; ''as cast'' with 68-cc chambers
Valve Size:
2.165 in. intake / 1.590 in. exhaust
Compression Ratio:
10.71
Rocker Arms:
Investment-cast, roller trunnion
Rocker Arm Ratio:
1.7:1
Recommended Fuel:
92 octane
Maximum Recommended rpm:
6600
Reluctor Wheel:
58X
Balanced:
Internal
Engine Includes:
• Fully GM assembled long block
• Oil pump, pick-up and Camaro oil pan (12628771)
• Corvette Harmonic Balancer
• Front timing cover with cam sensor
• Oil Filter
• Passenger Side RH Oil Dipstick and Tube (not included)
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