Forum: Engine Performance/Intakes/Exhausts
07-09-2013, 06:58 PM
Re: Hemifever can now tune 2011 5.7 GC's
Yes, been running Sean's 89 octane tune over the long weekend. Put about 200 miles on it and it has been running great. I also received the 91 octane tune, and will have to give that tune a shot...