I have a new in the box Magnaflow stainless steel 4" turbo back exhaust system. I purchased it for a truck I don't own any more, I replaced it with a 02 7.3l. The model number is pro series 17978 for the 2003-2004 ford 6.0l. I would like to sell it or trade it for a 2002 7.3l turbo back system. I am asking $300.00 for sell. I am in alabama, please contact me for more info. Thanks