i had spartan and have gearhead now and i like mine. Spartan will put a jerker in2 the 13s not sure on gearhead yet havent been to the track yet
you talking about 6.7 or 6.4?
I have a Spartan that I think I am about to sell. Lemme know if you want to save a couple hundred. Not sure if the tunes are "transferable" but I have 9 tunes.