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19540155 GM Genuine Chevrolet Performance LS3 • 430 HP • 425 lb-ft • Complete Crate Engine, Replaces 19435098, 19434636, 19370416, 19369326 and 19301326, 19419862, 19432414
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430 hp @ 5,900 rpm and 425 lb-ft @ 4,600 rpm
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?
Get the legendary Chevrolet Performance LS3 in a complete crate-engine package. The 19540155 delivers 430 horsepower at 5,900 RPM and 425 lb-ft of torque at 4,600 RPM, with aluminum construction, LS3/L92-style rectangular-port cylinder heads, hydraulic roller camshaft and 58X reluctor technology.
What's Included
- Complete Chevrolet Performance LS3 6.2L engine 19540155
- Intake manifold
- Fuel injectors
- Throttle body
- Water pump
- Harmonic balancer
- Ignition system
- 58X reluctor
- Aluminum LS3/L92 cylinder heads
- Hydraulic roller camshaft
- Chevrolet Performance warranty
LS3 6.2L 19540155 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):197224832064 | 2.16 intake / 1.59 exhaust |
UPC: 197224832064
Frequently Asked Questions:
- How much horsepower does the LS3/430 make? 430hp @ 5,900 rpm
- What is the displacement of the LS3? 6.2 L or 376 CI
- Is the LS3/430 a complete engine? Yes, it comes with an intake manifold, Coil packs, Ing wires, Water Pump
- Does the LS3 include a throttle body? Yes, it comes with a 90.00mm, Cast Aluminum Throttle Body
- Does the LS3 include a water pump? Yes, it comes with an aluminum PN 19180610
- What ECU do I need for the LS3/430? We suggest the GM 19540147 Harness and ECU Kit
- What transmission can I use with the LS3? You have the option of using the 4L65E, 4L70E, 6L80E and Super Magnum Manual 6-speed
- Will this LS3 work in my Camaro, Chevelle, C10, Corvette? Yes, call us for details
- What is the warranty? The Chevrolet Performance LS3 comes with a 2-year, 50,000-mile warranty. Call us for details
- What is the difference between the 19540155 and 19540156? The 19540155 is 430 HP, the 19540156 is 495 HP.
- What is the difference between the 19540155 and the LS3 long block? The 19540155 also comes with a intake manifold, coil packs, water pump and much more.
Link to information sheet
Link to Installation guide
Link to start up and break-in procedures
Terms and Conditions
Warranty Information
GM Performance Crate Engine Start-up Instructions
Still have questions or want more information, Please call us at 847-276-8110
E-Rod Converter LH 22909890
E-Rod Converter RH 22909889
E-Rod Converter RH 22909889
Frequently Asked Questions
What is the LS3 6.2L 430 HP crate engine and how much power does it make?
The Performance LS3 6.2L (Chevrolet Performance 19540155) is a 376 cubic inch crate engine rated at 430 hp and 424 lb-ft of torque. With the optional dual-mode exhaust on Corvette applications, it makes 436 hp and 428 lb-ft.
Does this LS3 come with a warranty?
Yes. It's backed by a 24-month GMPP warranty.
Is this engine internally or externally balanced?
It's internally balanced and uses a 58X reluctor wheel for ignition timing.
What fuel does the LS3 430 HP require?
It requires 92 octane fuel minimum.
What part numbers does 19540155 replace?
This crate engine replaces the earlier Chevrolet Performance part numbers 19435098, 19434636, 19369326, 19301326, 19419862, and 19432414.
How much does the LS3 430 HP crate engine cost?
It's priced at $10,755.88, down from a retail price of $13,529.42, with a limited-time free shipping offer, call for details.
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