I HAVE A 03 GT OBVIOUSLY AND I HAVE THE MAC EXHAUST H-PIPE WITH CATS AND THE CAT-BACK SYSTEM. THE SOUND IS AWSOME BETTER THAN FLOWMASTERS AND CHEAPER AS WELL. I CHOSE THE H-PIPE WITH CATS BECAUSE OF THE STRICT EMISSIONS LAWS AROUND HERE BUT I HIGHLY RECCOMEND MAC PRODUCTS YOU WONT REGRET IT!!!
