Originally Posted by Cousie
I installed my AR Design 5" race catted downpipe last week. In combination with the BMW performance exhaust, it's kind of loud
got a lot of thumbs up since I did this mod!
I'm also considering this DP and have a couple of questions.
Have you had any issues such as a rough idle or CEL?
How difficult was the install?
If you have a chance could you make a sound clip or video of the sound?
And most importantly, did you notice any performance gains?
Any other advice would be appreciated.