ok sofar as i have seen, all the lightweight pulleys are non-harmonic ballencing. just a solid pulley. well, i cant argue with how many are out there but that cant be good for a externally ballenced motor right? do they make a lightweight harmonic ballencer? possible tuning issues? everything ive read about bolting them to stock engines goes one way or the other. reason i am asking is kTwn's wrx. found this the other day while installing his stereo.
its just a pulley, where my stock is a harmonic ballencer. if i did that on my old chevy 350 even with a ballenced n blueprinted motor id still be asking for trouble shortly.