Well you already have a cat and personally I don't liek chnaing bits which already work ok plus remove it and you might have trouble at MOT time as the emmisions might be to high since the CAT is ther to reduce emmisions it can happen some car do and some don't have a problem.so what would you advise? cat or decat? would a cat back exhaust system them just fit onto the decat? thanks, Andrew.
It doesn't make it that much lounder.Always keep the cat. K-tec did some testing on one of their cars witha a decat amd after a while it started running on 2 cylinders to reduce emissions. it isnt worth having a decat, and plus will make your car very loud and uncomfortable on long journeys
That technical guy on Renaultsport said ''the de-cat could put the injection in a downgrade mode'' Hope that's not true as I'm fitting one soon.