Re: k&n air filter
You hole saw the cone out going into the carb. then drill 5 - 1/2" holes in the very back of the box and cut a slot in the interior of the box. I will say these mods are for their filter and jets, he went through all of the drilling and cutting. If you do this I'll take a couple of pic's and post so you can see what I'm talking about.
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