i plan on doing that to my z6 pulleyThey told me they'd do a run of 500 of them and sell them for $300 each if someone could guarantee upfront costs.
I had a stock pulley shaved down for $58 instead.
That's mine in the first pic. PS: You have to use a 92+ pulley.
Imagine a stick of metal with 4 levers on it pointing in different directions. Now attach metal sticks to each of those levers. Now use controlled explosions to push down on the 4 sticks. Lots of vibration, and the faster you spin the stick with the lever on it, more vibration will be created. The larger the explosions (more power), more vibration will be created. At a certain RPM you'll achieve a harmonic which can actually cause the metal to bend and/or crack. A damping pulley absorbs some of those vibrations reducing the stress on the crank.Yup. Harmonic dampening. Have fun.