19434636 LS376 Chevrolet Performance Crate Engine, Replaces 19370416, 19369326 and 19301326, 19419862, 19432414
430 HP LS3 6.2L The Hottest New Small-Block Now Available In A Box
What's Hot?
· 430 horse
· 376 cubes
· 24-month GMPP warranty
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. The LS3 helps power the new Corvette to a top speed of 190 mph. What will it power you to?
LS3 6.2L Tech Specs:
Part Number: |
19301326 |
Balanced: |
Internal |
Block Part Number: |
12623967 |
Block Type: |
Cast aluminum with 6-bolt main caps |
Bore X Stroke (in): |
4.065 x 3.622 (103.25 x 92mm) |
Camshaft duration (@.050 in): |
204 degree intake / 211 degree exhaust |
Compression Ratio: |
10.7:1 |
Connecting rods (P/N 12617570): |
Powdered metal |
Crankshaft (P/N 12597569): |
Nodular Iron |
Cylinder Heads (P/N 12598594): |
LS3 rectangle port: as cast with 68cc chambers |
Displacement (cu in): |
376 cu in (6.2L) |
Engine type: |
LS Series Gen IV small-block V-8 |
Maximum recommended rpm: |
6600 |
Piston Part Number |
19165089 |
Piston Type: |
Hypereutectic aluminum |
Recommended fuel: |
92 octane |
Reluctor wheel: |
58x |
Rocker arm ratio: |
1.7:1 |
Rocker arms exhaust Part Number: |
10214664 |
Rocker arms exhaust Type: |
Investment cast, roller trunnion |
Rocker arms intake Part Number: |
12569167 |
Rocker arms intake Type: |
investment cast, roller trunnion |
Valve Lift (in): |
.551 intake / .552 exhaust |
Valve size (in): |
2.16 intake / 1.59 exhaust |
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