I get to cheat and use machines like this, but that's the bonus of working where I do. We bend .12" tubing all the way to 10" diameter tubing...I WIN!!! LOL
Should last for a longtime but read the instructions, especially the part of not putting them on a fresh motor. Fresh motors run hotter and the coating will come off, my buddy wishes he would of read that part. He had to pull them back off and drop a couple hundred bucks on those brand new...
If you need exhaust, good exhaust all mandrel bent, stainless,aluminized, or just mild steel, any size. I might be able to help. Send me a pm and we can talk.