not sure if this is exactly the right forum, but... i have a 97 gtp. it has no resonator or catalytic converter. i had some vmax mufflers put on at muffler man, and they sound really good at idle, and while revving, just parked. but when i'm driving, it resonates really loudly and annoying at about 2,000 rpm. i'm trying to figure out if it's the no resonator, or no catalytic converter.