sports cat

Hi, I am looking at buying a Cobra Cat back system with a sports cat for my clio rs 200. I am wondering if anyone can comment on the flat spot issues I've been reading. Will a sports cat increase/create a Flat spot? Will a cat-back exhaust system increase/create a Flat spot? Is a...

Hi, I've been looking at getting a cat back for the clio and am really debating wether to get the sports cat as well but unsure whether id have to remap as well if i get the sports cat because of a flat spot... would prefer not to map is due to limited funds and sports cat is only going on if i...