Hi Guys,

I have searched around but not found any answers, but here is my situation. I picked up a ST fd tuned for a straight pipe. I would like to add a hi flow cat in the exhaust system, but am wondering how it will affect the tune. My thought is that everything should stay the same and if anything this would make the car run richer and slightly hotter, by how much I don't know. Would there be any other negative impacts? If anyone could provide some feedback it would be greatly appreciated.