No rear, front should be a 17 mm. At the time i disconnected the bar i was at a 2day RallyX event and hit a finishing cone on day one to put me 10 seconds out of 3rd and i felt the urge to get experimental. (and ya it sucked)
the LS came with a rear and got a 19mm front So I could just changing the front bar.
... the over-ride
Uhm now that you mention it i don't think i've checked that...