2004.5 - 2006 Chevrolet GMC Sierra Silverado 2500HD 3500HD Top kick 6.6 L Duramax LLY Complete engine Assembly 409-1 ARP 2000 Headstuds Emissions Deleted with Belt Driven Accessories Turbo Injectors Injection Pump Fan Clutch Exhaust Manifold Aftermarket Intake Flywheel Adapter Plate Starter Oil Pan Valve Covers Timing Cover Engine Harness And Fusebox No Core Charge!