i have been planning on getting the American Thunder cat back systeem that come with the original 40 series. when i recently went to the
flowmaster site they only had the 40 series delta flow with the American Thunder system for my car (2001 GT) and they were almost $200 more than last time i checked (like 2 weeks ago) What is up with that and can i still the American Thunder Cat Back with 40 series original mufflers????