Chevrolet Performance LS3 525 HP Long Block Crate Engines 19432629

This Chevrolet Performance LS3 (part 19432629) is the EFI-ready entry in the 525-horsepower LS3 lineup, arriving with its fuel injection system and throttle body already installed rather than left for the builder to source; torque reaches 486 lb-ft lower in the rev range than peak power does. What sets this LS3 apart from the long-block-only version Unlike a bare LS3 long block, this engine ships with its intake manifold, fuel-injection throttle body, water pump, and spark plugs already fitted, alongside an already-mounted harmonic balancer, valve covers, timing cover, and oil pan, giving you most of a running EFI engine rather than a platform you build induction onto from scratch. What is still excluded The flywheel, flexplate, wiring harness, and ECU are not part of this package; source these new or carry them over from your current engine instead. This engine is built around EFI and is not designed for carbureted fuel systems without modification, so plan your fuel system around electronic injection from the start. Running it right What fuel does it need? Premium at 91 octane or higher, given the 10.7:1 compression ratio shared across this LS3 family. Is this suitable for street use? Yes, Chevrolet Performance positions it for street performance, restomods, and track cars with a modern EFI-compatible drivetrain and ECU already in place. Can I run it carbureted instead? No, not without significant modification to the fuel system. Specifications Feature Details Brand Chevrolet Performance Manufacturer’s Part # 19432629 Product Type Crate Engine Crate Engine Family Chevy LS Actual Displacement 6.2L / 376 cubic inches Assembled? Yes Engine Block Material Aluminum Cylinder Head Material Aluminum Compression Ratio 10.7:1 Engine Balance Internal Camshaft Type Hydraulic Roller Rear Main Seal Style 1-Piece Intake Manifold Included? Yes Intake Style Fuel Injection Carburetor Included? No Throttle Body Included? Yes Distributor Included? No Oil Pan Included? Yes Valve Covers Included? Yes Timing Cover Included? Yes Water Pump Included? Yes Harmonic Balancer Included? Yes Flexplate Included? No Flywheel Included? No Air Cleaner Included? No Spark Plugs Included? Yes Spark Plug Wires Included? No Computer Included? No Wiring Harness Included? No Supercharger Included? No Quantity Sold Individually