Ive been looking at the Streamline kit. The Streamline web site kinda sucks but everything Ive found about their kit is positive...and its DOT approved.
Heres one link: http://www.accessorieshd.com/Internal_Throttle.php

SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq NEW: 19 Goldwing Tour DCT