how safe are the lightened underdrive crank pulleys ? Is the evo motor well balanced enough to run a lightened crank pulley with out ruining the crank or crank bearings. Perrin and megan racing , both state that all of that is just a myth and the stock harmonic dampener is just to reduce interior noise and vibrations . I ran a aem lightweight underdrive pulley kit on my 1999 4g63 eclipse and never had any problem and picked up about a noticable gain and dyno proven to put out an extra 10whp. So let me know what ya'll think.

 

i dont see why it would hurt as long as you dont cheap out on them