Fill it up again Dummy
Join Date: Sep 2012
Location: Central Valley, Sierra Mountains, California
Thanked 170 Times in 158 Posts
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Yep I agree^^ I too have the Atlas40 in my ficm and I really like it. I also have 4" straight exhaust and my milage went from high 13 mpg to high 16mpg,s and I was not expecting that at all.
The power in the lower range is not a big difference for my truck but when you are at highway speeds and mash down on the pedal it pulls like hell compared to the stock ficm tune. I have 38" tires and it will still go from 65mph to 95mph in a hurry, it's amazing the difference in the top end and yet at the same time my highway milage is 2+ mpg better.
So again YES go with the Atlas40......
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2006 F250 LARIAT CCSB 4X4
ARP Studs, O-Ringed Heads
X4 PHP 65 HP Custom Tow Tune
CAT EC-1 Coolant, IPR Coolant filter
Fass-125 to a Adjustable Pressure Reg.
Turbo-back SS 4" pipe, Corsa Muffler -7" Tip
6.4 starter, DC Power 270 w/ AGM regulator
Die Hard Platinum AGM all 2/0 Cables
Fabtech Radius Arms
7" lift w: Icon Progressive Coil Springs
2008 up Carli/Deaver rear springs
2000 Watts of McIntosh Bliss
All riding on some Fatty-Daddy 38/15.50/18 Toyo's