Thread: Cat-less make a big diff?

wrong. cats are not very restrictive.

the only reason to not have a cat is to not have to worry about it clogging. other than that, doesnt do anything for performance or sound.

Originally Posted by Bio248

it doesnt do anything for performance or sound.

First one...I agree.

Second...however...no. Going from a stock downpipe to a catless one makes a noticeable sound difference...and even more so when running headers. All of those setups were through a stock catback and you know how quiet a stock catback can be...it was quite a sound difference to know it wasn't stock.