I'm looking to install a trunk(that will hold 2 helmets) on my 2006 Silverwing. Can anyone help with part numbers and/or manf. on correct brackets?

Chet... look here. This is a post started by DennisB and has tons of information and other links for you to search through. If after reading all this, and you still have questions, come back and someone will help with some more information. There are lots of choices here. Get a good glass of warm milk or iced tea and read on...... http://www.silverwing600.com/t826-topbox-which-one-to-get

Chet,

Check out the link that Gary supplied...there are so many choices. I would suggest you get at least a 45 liter box to fit 2 full size helmets, unless you have a really large head. There is a "Pictorial" too here I did on how to mount a Givi Backrest ...since you will do the same thing, other than drilling 2 extra holes, to install the rack. It doesn't matter which rack you get, you will still need to remove the rear spoiler.

Take some pics before and after.