I thought they were cat back systems? Any other suggestions?
Oreca are completely road legal - they're cat back.
PLEASE NOTE - These are race exhausts systems, they are louder than the uprated performance exhausts we offer for road going vehicles. Whilst they meet the noise requirements for circuits in the UK, they are not designed for road use.
Incorrect, they come with a decat, and if you want to go cat-back and retain your cat they are not a straight fit (poke out too far).
Plus from k-tec's website