Description
Heavy-Duty Power from Chevy’s HD Trucks
With 401 horsepower and 464 lb.-ft. of torque on tap, the L8T crate engine is the largest-displacement LT-family engine in our lineup, offering plenty of low-rpm torque. Direct injection offers more precise fuel control than port injection, enabling a comparatively high compression ration of 10:8:1 in the engine, which contributes to its high output.
- Part Number: 19433748
- Engine Type: Gen V Small Block V-8 direct injection spark ignition
- Displacement (cu. in.): 400 (6.6L)
- Bore x Stroke (in / mm): 4.060 x 3.860 (103.25 mm x 98 mm)
- Block (P/N 19420904): Cast iron with 6-bolt nodular main bearing caps
- Crankshaft (P/N 12708884): Forged steel
- Connecting Rods (P/N 12675746): Forged powder-metal
- Pistons (P/N 12699527-R, 12699529-L): Hypereutectic aluminum
- Camshaft Type (P/N 12672469): Billet steel hydraulic roller
- Valve lift (in): 0.500 intake / 0.492 exhaust
- Camshaft Duration (@0.050 in): 193° intake / 199° exhaust
- Cylinder Heads (P/N 12703610): Aluminum rectangular port D/I with 59.02cc chambers
- Valve Size (in): 2.130 hollow intake / 1.590 inconel exhaust
- Compression Ratio: 10.8:1 (nominal)
- Rocker Arms (P/N 12619829): Investment cast roller trunnion
- Rocker Arm Ratio: 1.8:1
- Intake manifold (P/N 12639087): Composite
- Throttle body (P/N 12730580): 87mm diameter (single-bore)
- Fuel delivery: High-pressure direct injection (2,175 psi / 150 bar)
- Recommended fuel: 87 octane
- Ignition system: Coil-on-plug
- Maximum Recommended RPM: 5600 rpm
- Reluctor wheel: 58X
- Balanced: Internal
