Here is another set up with no cats.
www.myspace.com/tcechelon I'm still tinkering with getting the bugs out but should have it this month then for the chip. I used to race my friends 03' M3 and he would pull away from me on the highway bad. He installed a race exhaust... type slips my memory. I installed Evo intake, che's headers, exhaust, and fabspeeds test/ bypass pipes now he only moderately pulls on me. The sound is loud when on it but doesn't quite get you pulled when behaving. This car deserves to sound that way. I think people expect it when they see a modified Porsche... maybe a little different if that was the only thing's done. The resonance is not bad because of the motor firewall.