Your Hemi Challenger makes amazing power but the facory has left some extra power in the tune.  Choose from several custom tunes and gain up to 20 rear wheel horsepower on the 5.7L Hemi and up to 25 on the 6.1L.  Plus, DiabloSport Intune also adds tons of features like shift firmness, adjust redline, adjust speedometer and much more.

F.A.S.T. products are designed for EFI performance.  Their single and dual band air fuel meters are a must have for any tuner beginner or pro.  Easy to use and connects to most professional tuners.