stock 2003 6.6/allison help!!!
i'm wondering how much hp i can add without tranny problems.can i use a box programmer like predator diablo?i'm a diesel virgin and want a little more balls without buying a tranny
i just got an 2003 gmc with a 6.6 allison.how much power can i add without upgrading tranny?can some help with what i should upgrade and how much i can without blowwing tranny?predator diablo?