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Hello to everyone I've all parts to unlock my 100hp vmax but I have a question. Japanese mufflers have smaller holes(21mm) so air flow is lower(I think so). Is there any way to make these mufflers full version mufflers? Or only way is buying 145hp mufflers? This is my exhaust...

Hi to everyone I have Japanese version of vmax(100hp) and I'm making it full version. I have a dynojet stage 1,k&n air filter and I need to change exhaust(Japanese mufflers have smaller holes). And now is my question. Which one should I choose? Stock or some aftermarket mufflers? I want to...