Quote:
Originally Posted by MtangKlr
When you building your own down pipe, I understand bigger is better for turbo response. I already have a 2.5" cat-back exhaust on the car will having a 3" down pipe that reduces to 2.5" at the cat flange make a difference or should I just keep it all one size??  |
Run the largest downpipe you can fit. You will see an improvement, even with a cat-back of 2.5".