I tried searching but couldn't find any information. My 02 GT is in the shop getting bbk shorty headers, pypes xpipe, and pypes violator exhaust system installed. The shop is charging $500 to install and gave me a loaner car and will have done in 1 day. Is this about average install costs? I hear that these headers are a pain to install then hearing it only takes 3hrs to complete. What is the price you paid for installation?