Lightened Crankshaft Pulleys
 

I was browsing around ebay for parts I can put on WRX and I came across this:

[url]http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=6770&item=1876335801[/url]

its a lightened pulley I was wondering if it is worth it?? I have heard of vishnu's pulley has anyone tried this one??