I've seen people have taken the pre-cat out of existing cats, but has anyone removed everything from their cat and fitted it back together? Reviews and results if anyone has please

 

is there something wrong with you car or are you looking for sound and performance ? you could of course gut your cat as I believe that's what your asking

your factory cat is a very expensive piece of exhaust tubing lol I would refrain from gutting a perfectly good cat and buy a used ( if price is an issue) or a new catless dp

 

There's a used cat on ebay by me for very cheap so I'd gut that and keep my own as a spare. The cat is quite large in volume - would this cause pressure and turbo problems?

 

Yes I have done this in a couple of my racecars.

Worked just fine.

 

o if that's the case go for it idk if the size difference will make a difference