Looking for an upgrade for your 7.3 OBS Powerstroke from 1994-1997? Check out the MBRP S6218409 4 Inch Turbo Back Exhaust 409SS. This system is made from T409 stainless steel and includes a 3" aluminized downpipe. It's an off-road system that removes the catalytic converter, and is designed for automatic transmissions only. Installation is easy with common hand tools. Get the performance you're looking for with the MBRP S6218409 4 Inch Turbo Back Exhaust 409SS.