Lightened Crank Pulley from UDP

I was looking for any information anyone may have on this topic.
Some questions I have:

How much would a shop charge to replace mine?
Would it hurt my 3rd gen max's a/t?
Any effect on mpg?
Has anyone done this mod on their 3rd gen max?
--> If so, what kind've extra performance came from it?
--> If so, was it worth it?

Thanks to anyone with any helpful information.

Visit www.aspracing.com or www.maxima.org faqs.UDP is a great mod and asp makes them just for the 3rd gen.VE motor if you have a VG then check out www.unorthodoxracing.com