what year is your truck?i have a 05 lly dually and stock the best i could get was 15.8 and a steady average was 14.8 but after a exhaust and programmer i now CAN
get up to a steady average of 20 but the way i drive i average is 18
,my best yet was 23 all highway.plus you'll have enough power to spank most stock cars.
like my daddy says boyz will be boyz
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James
I HAVE THE MEDAL
05 LLY Chevy LS E/C L/B DRW my older brothers truck now
2006 LBZ GMC SLE C/C S/B,sold the truck to my dad for a business truck
My Truck now,1987 Chevy 2500 350 tweaked,6" SuperLift,350 V8 bored 60 over,Elderbrock headers Cam and Titanium Rockers,750 Twin Pumped Holley Carb and some other goodies.crank dynos over 400HP.