Originally Posted by AW330i
^^^ It most certainly is bolt on I have one...
do you have the entire "cat-back" system? Because the threads that I'd seen in this forum are eisenmann mufflers. And unfortunately the muffler only Eisenmann require that the stock muffler be cut off. Eisenmann supplies the muffler kit with a clamp and adhesive so that the muffler can be reattached to the stock pipes.
here's a link another link