I know everyone loves their drop in filters, but does anyone have any experience with their cat back exhaust systems? Auto Parts Warehouse has the AFE Mach Force XP Cat Back Exhaust for $350 with free shipping. Seems like a good deal on a stainless steel exhaust to me. Here's the press release for it, claiming a 26hp boost over the long bed stock exhaust: http://www.off-road.com/dirtsports/N.../detail/492657
Maybe I'll be the guinea pig if nobody else has tried one of these.