Quote Originally Posted by Smitherines View Post
The gasses will get sucked into the cabin. Ii have the last two feet cut off my 540i while I get ready to weld up an exhaust, and I smell it inside a lot, and that's a long car. I ran a 3" downpipe to a 3' x 3" pipe on my DSM a long time ago, sounded sick, but again, fumes were annoying.
Fumes are one of my big concerns. At a dead stop I seem to be sitting in exhaust fumes. Cruising seems ok so far.