If I wanted to cut my Cats off would I loose any power? I did a search but didn't quite find what I was looking for. I have stock manifolds to High flow cats. From the cats I have the pipe from my flowmaster catback exhaust. I am using exilerator mufflers. The motor is all stock. I need to get rid of my cats because I am doing the T45 swap with an external slave cylinder. Any help would be appreciated. Thanks. Sorry about the double post.