The underdrive pulley reduces power being sent to another accessories by being smaller but it is nothing major unless you have a high powered stereo system or anything else that might drain your battery.
I know that the reduced size of the RKsport Underdrive pulley for the Ecotec and Twincam reduces power being sent but will adding an High Output alternator fix this "problem"?
Is this a good idea?
need info and opinions please, thx
