Hi all, I am new to the forum and have recently just bought a 197 as a small project bit of fun . I have tried to look at all the treads/posts about the flat spot between 1500-3/4000RPM and exhausts but I seem to be looking for hours on end and not getting a definitive answer :nope:. I am aware that a remap would iron out the flat spots. I have been looking at a cat-back system, them a map. Question for me is, do I need to fit a de-cat or sports cat to get more power or is just the cat-back enough? What are the advantages of a sports cat?