Screen Type Spark Arrestor for 07 YZ450F

I have heard that there is a screen type spark arrestor end cap that will go on the 07 YZ450 stock exhaust. I guess I have to drill out the rivets to install it. Does anyone have a pic of it or know who makes it? Will it make the bike louder and will I have to rejet to compensate for it? Thanks!

Promotobillet.com:thumbsup:

Thanks!

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