dont forget to TUNE TUNE TUNE!
if you have a local muffler shop around your area i would go talk to them. i took mine to a custom exhaust shop... he put it on the lift and took off my exhaust and put pipes on it ( not welded on ) and had me hold the muffler up to it with glove to hear the different tones and pitches it would make. he reved it a few times and i got what i was looking for after 30 min of being under the car. picked it out and he called me back when it was done!
Thats the best thing i can think of!