Should I go with a down pipe or test pipe? I know with the evos, test pipe is already pretty efficient. Anyone dyno with one or the other or both? I already have a CBE. Also, I want to be careful with my warranty. Anyadvice appreciated.

 

car? i am assuming that you have an MS3, so i will give this advice; your warranty is already out the window since you are boosted and you opened up the exhaust to reduce the back pressure. most people are going with test pipes, but your best bet would be a down pipe, IMHO.