Yes - you need to remove the gas tank to install the front bars. I have also seen the the Tarett bars sold by our host and those are also very nice bars. I looked at all 3 - TRG, SRP, and Tarett (
http://www.pelicanparts.com/catalog/images/suspension_parts/tarett-Sway_Bar11.jpg) and to be honest, unless you are Jeff Gordon, I do not know how you could tell a difference in performance.
The TRG and Tarett bars are nice in that they are infinitely adjustable, unlike the SRP bars which have fixed adjustment holes. The SRP arms may wear better though because of this - who knows.
Bill