I know there has been some questions already regarding the FAST-1721, but I didn't see anything specific to a 2006 Honda Odyssey Touring.
I believe that the picture listed looks like it would match the Honda harness. I had installed a USA Spec Ipod adapter previously that hooked up to the back of the stock deck and it looks similar.
I love my older Bazooka tube that I have had for nearly 10 years now (still working and it is now in it's 3rd car!) and want to add some more bass to my van (it already has a sub located under the front passenger seat; but would like to add more). I saw that there is the FAST harness which would definitely ease a sub install (I want to keep my stock deck due to the fact that my touring model also has the NAVI and rear entertainment system).
Any help would be greatly appreciated!
If it does work, I will definitely be getting another powered tube for my Odyssey!