One year in town- have 2006 C6 convertible- one year old this month. Need referral to competent performance shop specializing in Vettes- looking to upgrade with Corsa Sport Exhaust w/xpipe; enhanced air inflow (not ATI procharger at this time) and possibly headers. If anyone has done similar upgrades, would appreciate your experience- make/model of equipment and your satisfaction. I would like to keep car smog/EPA legal following the mods, too, since I am subject to relocation every few years. I've had one recommendation for "Horsepower and Marine" shop in Pompano Beach, but that's a bit of a trip. Thx/kwf