sanekit
1,500 RPM
once u swap the extractor to after market one and 2" piping it'll be slightly louder than stock even with mitsubishi twintip sflow muffler. u can hear the roar in front. haha.Just to want to have a slightly improve performance. I read from others than it also improve the flow and smoother drive. Not going for those loud screaming pranggg... prangg... exhaust :-) too old for that.