I have the Vibrant axle back on my car. (p5). Lve it... got alot of compliments on the sound... its very low, and when you floor it it has a good sound. I like it, but it was not really a 'bolt on'... had to heat the pipe a tad to bend it so it would not hit the frame.
Other than that, ...... I recommend it. (my tip is the rolled/flarred kind... dont remember the part number)