leaner

I have been looking into getting the k&n air filter. I only do street riding. My question is would I need a pcv with just the air filter upgrade? Because I know that it is going to run leaner but do I really have to spend that much money for something that small? Also is it worth getting it...

Long awaited post. Sorry for the delay. The Yoshimura is a good alternative option to the Akrapovic system. Each have their pros and cons. Will be discussing each along the way. First set of data. The blue line is bone stock average blue. The green line is only installing the yosh system, and...