BD Diesel 1604721 Shift Kit | 2006-2008 Silverado 2500HD/3500HD

Features - Installation recommendation: Experienced technician - Includes our exclusive Smart Trim/Clutch Control valve assemblies and items to modify the C2 clutch piston for increased capacity and more durability. The C2 clutch is the weakest part of the early 5 Speed Allison - Addresses goes to neutral under load; 3-4 slip; burned C2/C3 clutches; sticks in one gear; won't move after extended parking; loss of pump prime; smart clutch control valves for increased durability; SHORT-CRISP-SMOOTH-upshifts & kickdowns - Handles 500 Street Horsepower Fitment - 2007-2008 Chevy Silverado 3500HD 6.6L - 2007-2007 Chevy Silverado 3500 Classic 6.6L - 2006-2008 Chevy Silverado 2500HD 6.6L - 2006-2006 Chevy Silverado 3500 6.6L Warranty Parts - Refer to Manufacturer's Warranty Emissions This product does not require an EO in California. By nature of its design, it is legal for sale and use in all 50 states. Replacement parts included. (EMS:4)