Originally Posted by momo3605
Just wanted to get some feedback regarding test pipes. So I have a stock M3 and I just want a cheap way to add power. So I'm thinking I'll add pulleys and a test pipe. But regarding the test pipe, can I run it with the stock x-pipe and stock axle-back? Also, what would I need to do regarding CEL lights? Will this set up drone and be overly loud? I saw the macht schnell post and I couldn't tell how much the sound changed over the dyno.
Also, is there any difference between different manufacturer test pipes? MS or others? Any particular you would recommend?
Most West coasters are running the Macht Schnell Bypass Test pipes. Here's one member's experiences in this thread:
Macht Schnell Test Pipes Installed!! (dyno/video)
Let me know if you'd like a package deal with the ESS E-Flash tune.