You will be fine on the 90 Hp tune. You should do alright with mpg also. Just remember you have 7k behind you!
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07' GMC CC/SB Diamond Eye direct downpipe, 4" Mbrp DP back, Airaid CAI w/Amsoil dry filter and prefilter, fingered and blocked, Transgo Jr, UDP tie rod sleeves, Cognito braces, H2's w/285 BFG's, Airdog 150, EFI Live, Autometer phantom boost and pyro |