6.6 CHEVY GM SPEED OF AIR LONG BLOCK (STD AUTO) 06-07 LBZ TOPKICK Core Charge Applies plus Core Container Charge (3000) of 500 Crate charge

The DFC Street Series Long Block Engine is designed for diesel enthusiasts, work trucks, and daily drivers needing a replacement engine for their 2006-2007 GM 6.6L Duramax LBZ. DFC implements significant improvements during the remanufacturing process to enhance reliability, even in applications with increased horsepower. Key improvements address common factory weak points, such as an EDM oil pump shaft with a hardened dowel and a Woodruff Keyed camshaft to prevent slipping and oil pressure loss. DFC utilizes Rottler machining equipment to achieve tighter and more precise tolerances than OEM specifications. Only the best cores are selected, rejecting components requiring extensive restoration.