the h pipe does throw a different sound in the mix but getting a 98 mark to sound like an 03 marauder would be like trying to get an 88 5.0 mustang with flowmasters to sound like a z28. everything is different except the firing order. the throttle body, the intake, no imrc's, the head(port size and location),cam profile, not to mention higher airflow across the board, cats in different locations, and the possability of an h pipe with a base mark with 2 into 1 to a split smaller diameter pipe and muffler things couldnt be more different, and the parts may be $50 but you have to pay someone to do it thats gonna be another $50, your better off just cutting off your mufflers altogether you'd be happier with that sound i think.