Anyone has installed this ugrade?

I need to do my tb and was thinking to upgrade my crank pulley with this lightweight. I'd like to hear any coments from anyone and what are the gains with this upgrade.

Thanks!!

<center><img src="http://home.ec.rr.com/miktip/Engine88.jpg"></center><p>
alternator &amp; powersteering pulley's.

No real noticable gain, but my engine said "Thanks man!" ;O)