Originally Posted by River Rat
They are bolt on, welding is optional. I didn't do it and seems ok. I choose it because I wanted no cats and no resonators. Plus Maddads and Berks seem nearly impossible to buy..
I had no problems getting Berk mid pipes, and getting stuff from Rich@Maddad isn't an issue either, if they aren't in stock a few weeks wait and you'll get them. The thing to remember with Maddad is you pretty much need to buy direct.