I am running the chrome Taz and very happy with it - I did do a whole bunch along with it though...
heads - valves - compression - cam - from V&H BR's dual to a 2 into 1 without baffles(Wicked Bros Sick IV).
Excellent increase in performance, but the stock intake with a K&N did not breathe nearly enough (Gates took awhile to get me my intake

).
Changed the intake after a couple hundred miles of playing with jets, accel pump and even torque cones(not good at all).
My intake/filter made an incredible difference, you definately need to let them breathe with the extra gas :2thumbs:.
The S&S dual seems to get great reviews, so that should not be a problem for you. :up:
I also need to change those ugly yellow fuel lines, they dont stay clear for long... :down: