Ok guys, I have a CCC ride coming up with my kids and I have to put a different Muffler on my bike (04 yzf450) to meet the sound level requirements and spark arrestor. I am thinking either the Yosh RS-3 or a White Brothers E-series. I am confused on the White Brothers though becasue when I look at them on Dennis Kirk some are advertised as an S-Bend version and some arent. What the difference between the two? Also which would you recommend the Yosh or WB? Thanks for the help guys.