I put a leo vince sp3 on my 2007 kymco super 9 ac and was exactly what I wanted. I can cruise to the end of the speedo easily but usually roll about 45 mph(on speedo). Aware that faster speeds can be acheived with the super 9 but this is the speed I like to stroll. No more red hot pipe, although the bright orange glow was cool at night. I had to put lighter rollers than what they sent me but that was to be expected i reckon. This pipe sounds good, fits good, and loosens her up(the motor). Size of this pipe seems small at first but it'll grow on ya and the flat black finish is good for the street runner look. I don't post here much but I was so happy with the pipe and the performance it deserved some words.