Quote Originally Posted by Spikew919 View Post
Have you noticed any noticeable gains in mpg? Been thinking about doing this on my 2015 ImageUploadedByTapatalk1425699274.690758.jpg already have the efi live that i program my 07 Duramax with. Definitely impressed with what it done to it. ImageUploadedByTapatalk1425699425.485368.jpg
Absolutely, it's very hard to lose those gains though with how snappy the throttle hits now and with actually being able to hear the exhaust! I went from an average of 14 city to about 17-18 and an average of 17 hwy to about 24!