| Yet another exhaust question.
So I crawled under my '02 LB7 today and there is no cat there. But it is the 3.5 inch pipe all the way from the turbo back. So I guess my question is this, If I just have a new muffler installed would that move enough exhaust to make a difference or would the extra half of an inch from a 4 inch turbo back exhaust make THAT much more of a difference? |