If you know of a driveshaft shop, they have tubing that is about .060-.085 in thickness up to diameters around 4 1/2". I used an old twisted driveshaft I had for my stack because I didn't feel like adding that much weight to use the 1/4" walled stuff I got from the steel place.Puff wrote:Playing it safe... Taking tomorrow off by Monday, I'd better be done. It may not have a stack but she'll be ready. No one around here sell pipe less tha 1/4"