I have a 1991 RS v6 3.1L. I currently have a Flowmaster on it and I hate the sound and the performance seems like it could be better. I've tried to find a complete system for it but I can only find systems for v8's. What I want to know is what would be a good sounding and performing set up. Magnaflow, Borla or stay with the Flowmaster? I'm not interested in changing out the headers right now, just want the car to breathe better without loosing performance or power. It's only a v6 but it mine and its fun. Help?