Has anyone actually installed any of the lightened engine parts (flywheel, crank pulley)?

If so, does it make enough difference in performance gains to justify their cost/installation time?

How easy are these parts to install?

Are there any other lightened parts that I haven't mentioned out there?

Please don't respond to this if you *WANT* these parts; only respond if you *HAVE* these parts.

Well..............I had the Perrin pulley but it didn't fit. So I'm waiting on a replacement part which should be here soon. I'll let you know then 8)