paul j
Well-known member
My exhaust system (stock and engine also) from cat back is shot. I want to replace with 2.5", and change down pipe to 2.5" also. Are there 2.5" cats available and is it legal to change them? I assume replacing the cat with larger one makes the most sense for performance but how much difference for the price? I can not find any down pipes, are there any places to buy 2.5" down pipes or do I just let a muffler shop make a down pipe when they do the exhaust system?