GM 6.6L L8T Performance Assembly

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Item Number: 19433748

$8,948.80 plus shipping
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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 cast iron, long-skirt cylinder block with six-bolt, and 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 the Installation Notes below for recommendations.
 
TECH SPECS
 
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): 193º intake / 199º 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
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
 
 
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
• Use Front End Accessory Drive system P/N 19433745 for applications with air conditioning and Front End Accessory Drive system P/N 19433746 for applications without air conditioning
• Includes 8-bolt flexplate for automatic transmissions
• Used with Engine Control kit 19433736 (must use 6L80 transmission). Includes programmed controller, wire harness, pedal, oxygen sensors and mounts, MAF, Fuel Line Pressure Sensor, and Fuel Pump Power Module

We ship parts and engines worldwide!  **MERCURY PARTS CAN ONLY BE SOLD AND SHIPPED TO ADDRESSES WITHIN THE UNITED STATES.

Parts orders placed before 1:30 pm EST will normally be shipped the same day or next buisness day (if the item is in stock). If you need your parts asap, FedEx Overnight, second-day air, etc., are also available (Deadline is 1:30 pm Eastern time). *Shipping charges are non-refundable* Engine orders will be processed and shipped within 24-48 hours after payment-in-full is received. For special engine orders, shipping time is based on current stock and build time.

Items under 75 pounds are sent via FedEx in Continental USA. Items sent overseas are sent via FedEx international, or air freight (depending on item weight). FedEx cannot ship to P.O. boxes.

All Packages over $175.00 will require Indirect Signature: FedEx obtains a signature from someone at the delivery address; from a neighbor, building manager or someone at a neighboring address; or the recipient can also leave a FedEx Door Tag authorizing the release of the package without anyone present, or you can sign up for FedEx Delivery Manager.

Canadian Shipments

Rates for Standard service to and from Canada do not include charges for customs clearance. For shipments from Mexico, routine customs clearance is included. Customs brokerage charges, duties and taxes will be billed to the importer unless otherwise indicated by the shipper. Some shipments to and from certain locations may require additional time in transit.

Engine Shipping

For a shipping quote, please email sales@michiganmotorz.com or call (248) 524-9600 with your shipping address and contact information. We use different freight carriers to find you the lowest price AND safest delivery. Some of the freight carriers we use are R&L Freight, Con-Way Freight, Estes Express, Pilot Air, USF Holland, Forward Air, Old Dominion, Overnight Express, Watkins, and Dayton Freight. Engines can be picked up at a local shipping terminal or dropped off at your location*. Engines are packed in specially designed crates made for that engine**.

All oil & lubricating fluids are drained before they are sent out (this is required by our freight carriers). All engines & parts are packed by our shipping department. Engines are then inspected by our shipping manager before they are loaded onto a freight carrier.

*Certain restrictions apply

Returns

For items received as described, a refund of the final invoice price (minus shipping and handling charges and a 15% restocking fee) will be issued. Buyer is responsible for return shipping costs and for sufficiently packing and insuring returned items unless otherwise agreed upon. Refunds will not be issued for damaged merchandise. All returns must be made within 15 days of delivery to you. No refunds for electronic parts if the box is opened. All returns must have an RMA # and invoice #. 15% restocking fee on the return of any complete engine. Please call or email for an RMA #.

Returns must be shipped to:
Michigan Motorz, LLC
32333 Mally Drive
Madison Heights, MI 48071
(248) 524-9600

If parts arrive damaged in shipment, it is the customer's responsibility to notify the carrier immediately and reject the damaged package. Contact Michigan Motorz of the potential damage. A claim will be filed and we will send out the identical part. If parts are damaged in shipment and the customer does not notice damage, please call Michigan Motorz, LLC.

*= No Sales Tax OUTSIDE the state of Michigan. Orders placed over the phone or through our website will be charged 6% for sales tax within the state of Michigan.

For items received as described, a refund of the final invoice price (minus shipping and handling charges and a 15% restocking fee) will be issued. Buyer is responsible for return shipping costs and for sufficiently packing and insuring returned items unless otherwise agreed upon. Refunds will not be issued for damaged merchandise. All returns must be made within 15 days of delivery to you. No refunds for electronic parts if the box is opened. All returns must have an RMA # and invoice #. 15% restocking fee on any complete engine. Please call or email for an RMA #.

Returns must be shipped to:
Michigan Motorz
32333 Mally Drive
Madison Heights, MI 48071

If parts arrive damaged in shipment, it is the customer's responsibility to notify the carrier immediately and reject the damaged package. Contact Michigan Motorz of the potential damage. A claim will be filed and we will send out the identical part. If parts are damaged in shipment and the customer does not notice damage, please call Michigan Motorz LLC.

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