what cams that are in a car is'nt goign to affect the bitch spinning a rod bearing/ throwing a rod and or breaking a valve....and i do belive that is the only thing happens when nitrous " goes wrong". and last time i checked a I/M isnt going to affect it either. so yeah it's a stock motor. UNless u consider it "built" because it has cams and intake, and if u do i would just consider you plain stupid.