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
The sound will increase as there's no Primary Cats restriction. You will need a tune for the CEL or the Akra Delete-R. I don't think there's much difference between known manufactures. I ordered mine a week ago with Sal from AUTOcouture excellent service, fast shipping, and outstanding price. I got the Test Pipes with the ESS Tune as a bundle. Give them a call you won't regret it.