[mcsmokey]

I'm getting ready to buy a cat back system for my frs. I've been looking at the Greddy Evo Gt. I was also looking at the Perrin cat back system but I think it's just too quiet considering I currently don't plan on doing anything else with the exhaust. I'm just wondering has anybody had any issues running a 3" cat back system on N/A motor or could I expect any issues to arise?