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Open question to all memebers-Thinking about changing the air filter and exhaust tip on my 07 450 Grizzly to the K&N Air Fliter and the billet 2"exhaust tip. I realize this is a basic upgrade but was wondering about rejetting. I did this to my Rincon with no problems. Any input from other members would be appreciated. I will monitor plug color to get a good picture of whats happening but still wondering about Jet sizes?
 

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Not a big fan of K&N, I like the Twin-Air much better. Do a search and you will see the thread on the K&N debate. With the new filter and tip it is unlikely you will have to rejet, like you say though, just keep an eye on your plug...........
 
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