Hello, my name is Will. I have a 2004 XLR and I live in Dallas, TX. My baby is Thunder Gray with slate interior. I have the 18 inch premium XLR wheels and a wind restrictor windscreen. I have tinted windows, smoked tail lights and 3rd brake light and had all of the emblems painted pewter. It looks real good against the gray. Mechanically, it is all stock and I have all my service done at Sewell Cadillac by Certified Technicians. I really want to add a custom exhaust to improve the sound. What do you recommend, Corsa or Magnaflow? Thanks.