Choate Performance 6.6L Long Block Model C LLY Kodiak Engine 04.5-06 Duramax Diesel Engine Core Charge of 2000 Applies CEP66LLYLCK

The Choate Performance Engineering Model C LLY Engine is a budget-friendly long block designed to offer near-stock power with critical OEM issues resolved. It features upgraded pistons and enhanced valve integrity to address common factory weaknesses. The engine block undergoes precise CNC blueprint machining, ensuring accurate dimensions, tight tolerances, and optimal alignment through processes like decking, diamond honing, line honing, and boring. The cylinder heads are meticulously machined and enhanced in-house to improve airflow and overall reliability, involving magnaflux and pressure testing for imperfections, precision decking for a superior seal with MLS head gaskets, optimized valve seats, and blueprinted valve train geometry. The key features include upgraded pistons, stronger and designed for demanding commercial applications, which resolve the OEM issue of weak, crack-prone pistons. The engine also boasts enhanced valve integrity with all-new, upgraded material valves that eliminate the high-heat separation prevalent in OEM exhaust valves, preventing compression loss and piston-to-valve contact. This long block is specifically designed for 2004.5-2006 Duramax Diesel engines.