This kit is on the Aero Website for $659.00 Looks to me the margins are pretty sweet here.... <a href="http://www.aeroexhaust.com/ford_diesel_exhaust_kit.html" target="_blank">http://www.aeroexhaust.com/ford_diesel_exhaust_kit.html</a> The F314014-40 2003-2007 Ford 6.0L 4" Diesel Kit includes the following: * 4040XL Resonated Diesel Muffler * DT4050 4" Exhaust Tip * 3 x 4" Clamps * 3.5" Clamp * 4" Adj. "T-Clamp" * 4" Hanger Clamp * Turbo Downpipe * Downpipe Extension * 43" Extension Pipe * 22" Extension Pipe * Tailpipe Extension * Tailpipe