Okay I've heard/ read mixed things about the under drives. The one that concerns me the most is increased vibrations in the motor or the feeling of more vibrations. Can someone fill me in...please. Is the pulley safe or not? If so which one?
I don't have an under drive pully for the Z. However, I had one for my Nissan 300ZX. Too me, I will not spend any money on minor mods like intake, under drive pully again. Go with head/cam, supercharger, stroker, or turbo if you want noticable hp gain. They are much better investments. :cheers: