Chevrolet Performance L8T Gen V Small Block V8 Crate Engine - 6.6Lt (400ci) - 401HP

Unleash the raw power and precision of Chevrolet engineering with the Chevrolet Performance 19433748 L8T GEN V LT 6.6L Crate Engine. Delivering 401 horsepower (299 kW), this powerhouse combines decades of small-block legacy with advanced Gen V LT technology for unmatched reliability, torque, and efficiency. Designed for builders, restorers, and performance enthusiasts alike, the L8T brings modern power to classic and custom projects.

Key Features:

  • Engine Type: L8T GEN V LT 6.6L small-block crate engine – the next evolution in Chevrolet’s legendary performance heritage.
  • Impressive Power Output: Produces 401 horsepower (299 kW) for commanding performance and thrilling acceleration.
  • Advanced Gen V LT Technology: Features modern design innovations for enhanced fuel efficiency, cooling, and durability.
  • Reliability and Durability: Built with precision craftsmanship for long-lasting performance under demanding conditions.
  • Versatile Application: Ideal for classic restorations, street machines, or custom builds seeking modern power with traditional muscle character.
  • Factory-Backed Quality: Genuine Chevrolet Performance component designed, tested, and validated for excellence.

Specifications:

Feature Details
Part Number 19433748
Engine Type GEN V LT Small Block – L8T
Displacement 6.6 Litres (6600 cc)
Horsepower 401 HP (299 kW)
Block Material Cast-Iron with Cross-Bolted Main Caps
Crankshaft Forged Steel
Cylinder Heads High-Flow Aluminum
Fuel System Direct Injection
Compression Ratio 10.8:1
Induction Natural Aspiration
Recommended Installation Professional installation by certified technicians is recommended
Engine Type Gen V Small Block V7 direct injection spark ignition
Displacement 400 CID (6.6L)
Bore x Stroke 4.060" x 3.860"
Block 19420904 Cast iron with 6 bolt nodular main bearing caps
Crankshaft 12708884 Forged steel
Connecting Rods 12675746 Forged powder-metal
Pistons 12699527-R, 12699529-L, Hypereutectic aluminium
Camshaft Type 12672469 billet steel hydraulic roller
Valve Lift 0.500" intake / 0.492" exhaust
Camshaft Duration 193° intake / 199° exhaust @0.050"
Cylinder Heads 12703610 Aluminium rectangular port D/I with 59.02cc chambers
Valve Size 2.130" hollow intake / 1.590" inconel exhaust
Compression Ratio 10.8:1 (nominal)
Rocker Arms 12619829 Investment cast roller trunnion
Rocker Arm Ratio 1.8:1
Intake Manifold 12639087 Composite
Fuel Delivery High-pressure direct injection (2,175 psi / 150 bar)
Recommended Fuel 87 Octane
Ignition System Coil-on-plug
Maximum Recommended RPM 5,600
Reluctor Wheel 58X
Balanced Internal
SKU 19433748
Barcode # 9356659496345
Brand Chevrolet Performance

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