L8T Long Block - IN STOCK !!

L8T Long Block Chevrolet Performance LT-Series Crate Engine 19433750

401hp @ 5,200 rpm

464 lb.-ft. @ 4,000 rpm

NOTE: Refer to catalog for the complete horsepower and torque testing procedures.

LONG BLOCK

Chevrolet Performance offers the L8T Long Block - the high-output, direct-injected foundation of the Gen V Small-Block-based 6.6L engine offered in the Silverado 2500HD and 3500HD models.

Our L8T Long Block includes the direct injection cylinder heads and coil-on-plug ignition system, as well as the oil pan with dipstick, but does not include the intake manifold, throttle body, engine-mounted high-pressure direct injection fuel pump or fuel injectors. All must be sourced separately to complete the engine assembly. Additionally, the Front End Accessory Drive system is not included. See Installation Notes for recommendations.

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 ratio of 10.8:1 in the engine, which contributes to its high output.

It’s built with a forged steel crankshaft and other high-strength parts. Additional features such as oil-spray cooling for the pistons and a cast iron, long-skirt cylinder block with six-bolt, cross-bolted main caps contribute to the engine’s strength and durability. Comes with production style exhaust manifolds.

Our L8T crate engine package comes complete from the throttle body to the oil pan, including the PCV tube, evap tube, oil dipstick and oil fill tube and cap. It does not include the controller, harness, oxygen sensors or a Front End Accessory Drive system. See Installation Notes below for recommendations.

Chevrolet Performance L8T Long Block Crate Engine Installation Notes

• Engine is shipped with high-pressure direct-injection fuel pump installed
• Front End Accessory Drive system must be ordered separately and includes hydraulic power steering, with center pulley. Pulley-mounted fan not recommended. See page 107 for options.
• Includes 8-bolt flexplate for automatic transmissions
• 2024+ use with Engine Control kit 19435726 for 6L80-E transmission. Use Engine Control kit 19435606 for 10L90-E transmission. See catalog for details.
• Available in Connect & Cruise with 6L80 and 10L90 transmission options

Mobil 1 is the recommended engine oil for all Chevrolet Performance Engines

Chevrolet Performance Crate Engines include a 24-month or 50,000-mile/80,000-kilometer limited warranty, whichever comes first. See your GM dealer for details.

Chevrolet Performance does not utilize any used or remanufactured parts in this crate engine, except for the starter, alternator and power steering pump

This part is intended for competition use only. See page 2 of catalog for complete details