Nope, I tried to determine that when I put it on but my edge died on me during my 1st mpg run. I now have the TST on there so I cant make a mpg comparison. What I can say though is that right after putting it on, my truck did not downshift as much if at all when passing on 2 lane roads. What this ment to me was i wasnt on the throttle as hard to get around slower cars.

when I put on my 30" magnaflow and did a cat delete, my bottom end dropped off significantly (top end now screamed), when I added the ATS intake, alot of low end torque was brought back. you could easily feel it around 1500 rpms.

If you do decide to get one, talk to Jason at www.Dieselnutmotorsports.com he is where I get most of my parts from, he is the one who installed my valve body (and loaned me his 12.5 sec 1/4 mile truck to go to work in). excellent guy to do business with.

buy one, you'll love it.