Choate Engineering CEP66LMLLW Long Block Workhorse Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Features:

• Adds reliability over stock
• O-Ring heads with pressure testing and new seats
• Stage 2 camshaft for enhanced performance
• Delipped, fly-cut, and coated pistons
• Manton heavy-duty pushrods for durability
• ARP head studs and new head gaskets included
• CNC blueprint machining for precise alignments
• Diamond-honed cylinder bores for exact clearances
• Balanced and polished crankshaft for smooth operation
• Assembled by Choate's professional in-house team

Improved Reliability and Performance for GM 6.6L Duramax

If you're looking for a powerhouse engine to elevate your 2011-2016 GM 6.6L Duramax, pick up the Choate Engineering Long Block Workhorse Engine which is engineered to deliver exceptional performance and reliability for daily driving, family hauling, and recreational towing. This 6.6L LML long block is packed with premium features including O-ring heads, a stage 2 camshaft, and carefully designed delipped, fly-cut, and coated pistons. Manton heavy-duty pushrods ensure durability, while the in-house built heads undergo rigorous testing and enhancement processes like pressure testing, valve grinding, and the installation of new induction-hardened seats and valve guides.

Durable Construction & Design

Choate's precision-focused assembly includes CNC blueprint machining for flawless alignment and clearances. Additionally, the cylinder bores are blueprinted, bored to a perfect 90 degrees from the crankshaft centerline, and diamond-honed for exact piston-to-cylinder fitment. Each component is balanced and inspected to ensure optimal performance. The block is surfaced to a factory-spec finish, guaranteeing proper MLS gasket sealing. With new upgraded pistons, OE lifters, lifter guides, and a balanced crankshaft, this engine is built for longevity and smooth operation. A

Fits: 2011-2016 GM 6.6L Duramax

Application Notes:

• Perfect for daily driving use, family haulers, and recreational towing (not intended for commercial use).
• $1500 Core Charge Required

Year Ranges	Make	Model	Series	Engine
2011-2016	GM/Chevrolet/GMC	Silverado/Sierra	2500HD/3500HD	6.6L Duramax LML

Property	Values
Year Ranges	2011-2016
Make	GM/Chevrolet/GMC
Model	Silverado/Sierra
Series	2500HD/3500HD
Engine	6.6L Duramax LML

📄 Download Core Return Form (PDF)