Hello Squid. This is my first post. I have read several of your posts and sounds like you are making some of the same mods I plan on. I would like to know how loud the Magna Flow exhaust made your truck and whether it actually helped your mileage. I just traded my 2001 HO CTD with 6 spd manual for an 08 Quad cab 4wd short bed. I am getting about 15.5 combined and a trip to Houston last week I got 17.5, a far cry from the 20/25 calculated from my 01. I would like to make improvements without the hassle of any warranty issues. I also don't want to build a truck that I can't stand to drive because of the noise, my hearing is already bad enough.

Thanks for your time.