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cut air box with k and n

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I have a 05 crf450r and i was thinking of cutting the air box sides off like the super moto guys do and running that cageless air filter by k and n.do you think ill have to rejet and if so what?never rejetted a 450 :applause:

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stock motor?

if so,it wont make any difference modding the 05 air box.

you will need to go up to a 170 main jet with the KN Xtreme filter.

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