408 stroker crate engine for classic muscle cars, performance trucks, restomods, and custom LS engine swaps. This GM LS-based 408 cubic-inch V8 package combines a heavy-duty 6.0L iron block with forged rotating components and performance cylinder heads. The stated output is 600 horsepower and 550 lb-ft of torque, making it an option for builders seeking a high-output V8 for a serious performance project.
GM LS 408 Stroker Engine Performance
This 408 C.I. stroker crate engine increases displacement beyond a standard 6.0L configuration to support a performance-focused build. Its iron block provides the foundation, while the forged rotating assembly is designed for demanding engine applications.
The package is rated at 600 HP and 550 lb-ft of torque, according to the supplied specifications. Actual output depends on engine configuration, tuning, fuel, exhaust, and supporting components. Confirm whether these ratings represent crankshaft output or measured wheel horsepower before comparing this engine with other performance packages.
408 Stroker Crate Engine Specifications
- Engine type: GM LS-based 408 stroker V8
- Displacement: 408 cubic inches / approximately 6.7L
- Stated horsepower: 600 HP
- Stated torque: 550 lb-ft
- Block: Heavy-duty cast iron, based on a 6.0L platform
- Bore: 4.030 inches
- Stroke: 4.000 inches
- Crankshaft: Forged 4340 steel
- Connecting rods: Forged H-beam
- Pistons: Forged
- Cylinder heads: Aluminum rectangle-port
- Camshaft: Performance hydraulic roller
- Included electronics: Pre-calibrated ECU and standalone wiring harness
- Warranty: 1 year, subject to the supplied warranty terms
Forged 408 LS Stroker Rotating Assembly
The forged 4340 steel crankshaft, H-beam connecting rods, and forged pistons form the core of this engine’s rotating assembly. These components are intended for a performance-oriented combination, but the engine’s actual operating limits depend on component specifications, assembly tolerances, lubrication, cooling, and calibration.
For a 600 HP build, confirm the compression ratio, cylinder-head specifications, camshaft details, fuel requirements, and recommended RPM range. These details help determine whether the engine matches your intended street, strip, or mixed-use application.
408 Stroker Engine Package with ECU and Wiring Harness
This package is advertised with a pre-calibrated ECU and standalone wiring harness to help simplify electronic integration during an engine swap. Compatibility still depends on the engine configuration, ECU calibration, sensors, transmission, and vehicle wiring.
Before ordering, verify which accessories and installation components are included. Engine mounts, fuel delivery, cooling, exhaust, accessory drive, and transmission fitment may require additional parts depending on your vehicle.
Built for Muscle Cars, Trucks, and Restomods
A GM 408 stroker crate engine can suit compatible classic muscle cars, custom trucks, and restomod projects that need more displacement than a standard 6.0L setup. Its combination of an iron block and forged internal components makes it worth considering for a performance-focused build.
Choose the engine based on more than peak horsepower. Vehicle weight, transmission strength, rear gearing, intended fuel, cooling capacity, and street-driving requirements all influence how well the complete powertrain works together.
What to Confirm Before Ordering
- Verify the engine’s exact configuration and assembly specifications.
- Confirm the 600 HP and 550 lb-ft ratings and how they were measured.
- Check ECU calibration and wiring harness compatibility.
- Review fuel, cooling, exhaust, and transmission requirements.
- Confirm the package contents and any additional parts needed for installation.
- Review the 1-year warranty coverage, exclusions, and conditions.
Choose this GM 408 stroker crate engine package by matching its verified specifications and included electronics to your project. Confirming fitment, tuning requirements, and supporting components before purchase can help you plan a more complete and reliable engine swap.
