Just finished the installation of a Banks Exhaust Brake on my 2006 4x4 with auto transmission. If anyone thinking or doing the installation and would like input on the instalation let me know. The installation guide has some errors and missing information you may need. Also a short cut that can save hours and many busted knuckles I purchased my Banks kit from one of there distributors to save about $200. 00. When you do it that way Banks will not give you live assistance on the phone. They also will not talk to you to except input on how to correct the problems in the installation guide. If you need input let me know.