Your factory down-pipes and up-pipes have a penchant for creating too much back pressure can hinder your turbocharger's performance as well as restrict exhaust flow. Aftermarket down-pipes and up-pipes are generally larger than stock and feature smooth bends that allow for the smooth flow of exhaust gasses in and out of your turbo's turbine housing, leading to smoother, more efficient operation and more power for your truck. All of our up-pipes and downpipes we offer here at Stage 3 offer precise fitment and can help support aggressive tuning by lowering EGTs. Also be sure to check out our 6.0L Tuners category for a complete performance overhaul! Ford Super Duty Fitments: 2004, 2005, 2006, 2007 Ford F250 & F350 6.0L Submodel Fitments: FX4, King Ranch, Platinum, Lariat, XLT, XL Some Exceptions apply, please see individual product pages for specific fitments.