| Weight is where the overwhelming majority of the gains come from anyway.  If you get the skyline (instead of the 300ZX) fischer pully it IS underdrive (on our cars). FWIW, UR and other popular non harmonically balanced pulleys weigh about half of the Fischer (which as Dee reported is about half stock). The choice for me is the lightest pulley I can get that is stock sized WITH a harmonic dampener. 
 
  m a g l i t o
 parts are FINALLY here - engine is going back together NOW
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