I have these on my sidecar outfit, on a 2001 IS. For Trike, Darrell will let you know if 6 or 8 deg. wanted. I believe mine is a 8. Really helps with making the steering easier. I believe we then went with a 2" extension, again from xf-6, Darrell, to level the bike back up.
Great Valkyrie vendor.
Stand up guy.
MP