I bought my car with underdrive pulleys already on it I have no idea what brand they are i know the crank pulleys is 4.5" The volts are very low at idle and lights dim and the car gets hotter than it should id like to get the stock pulleys back on it and see if it helps or if someone doesnt have any problem with thier underdrive pulleys let me know what brand they are so maybe i can try them also does anyone have some stock that they dont want? thanks