So I just finished my new exhaust on my sig truck. I got it fron a company called Alro Steel, the kit was super easy to install. Cut everything from 4 inches past the down-pipe to 4 inches before the tail pipe went over the axle. This kit was a 90" long section of 3.5"x.055 wall 409SS. I got to say, strait pipe on a diesel is the t!ts when you hammer it!