Here is what I have so far, it is not the lightest!!
144 CR RAcing Tunnel
Mountain Mod Seat - there is a Boss on ebay currently
144 M-10 W2 Air
TJ's Tunnel Dump Exhaust
Pioneer Wide Front Kit - there is a barkbuster in the swap section
Had a light weight body kit, I sold it though - it used a light bar and two piaa lights.
I would love to put it on the scale once it is complete, if I only had access to one! The only downside is the cost - look on Snow West for more lightweight info.