Current Lead Times: In Stock Engines Ship Same or Next Day - Out of Stock: 1-3 Weeks on Most Long Block Engines; 3-5 Days on Heads – *call us for more exact lead times for your specific build 
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Chevy Trucks
6.7 Powerstroke Choate Engineering
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Cylinder Head Category

6.6 LLY 2004.5-2006 Duramax

The 6.6L LLY Duramax engine (2004.5–2006) delivers strong power and torque, ideal for towing and heavy-duty work. With a turbocharged V8 design and improved fuel system, it offers solid performance and efficiency. The LLY features a reliable turbocharger and better emissions control compared to earlier models, making it a popular choice for both work and performance builds.

Boost your LLY Duramax with premium parts and upgrades today!

6.6L LLY Duramax engine

The 6.6L LLY Duramax engine delivers strong power and torque, ideal for towing and heavy-duty work. With a turbocharged V8 design and improved fuel system, it offers solid performance and efficiency. The LLY features a reliable turbocharger and better emissions control compared to earlier models, making it a popular choice for both work and performance builds. Boost your LLY Duramax with premium parts and upgrades today!

Building engines the way the OEM factory should have in the first place.

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