Cognito CV Front Driveline Kit For 4-6 Inch Lift-Duramax/ 4-12 Inch Lift-Gas On 01-16 Silverado/Sierra 2500/3500/ 7-12 Inch Lift On 99-06 Silverado/Sierra 1500.This direct bolt in driveline features a 1310 series double cardan CV and it is made in the USA. This kit includes the Cognito Allison Transmission Bracket.Note: Part number 110-90278 Shift linkage relocation bracket is required if truck is equipped with six speed Allison transmission.