| I've yet to hear anything bad about either brand. I'm running the UR crank pulley and nothing else. I'll be picking up the BliZki water pump OD pulley very soon though. I would recommend doing the same (there are a couple different places offering them now), with whatever brand of underdrive pulley you go with. It would seem that the crank pulley does the most good for you, and the rest (although probably contributing) are more of a show item than performance when compared to the underdriven crank pulley.
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