'12 R/T STP with the 20 in upgrade M/T and GoodYears.CAI and CatBack only mods and cant wait til the track opens.Impromptu launches so far have been sketchy at best for getting a good leave.Noticed some of the cars at the local dealership have Firestones rather than the GY F1's.Anyone have input on the Firestones?Mid to low 13s and I'll be happy.Wish there was a tune available.