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Discussion Starter · #1 ·
hi im new to the sit. I was wondering if anyone had any info on the 440 big bore kit for the 400ex? i have some mods all ready i'v got white bros pipes, k&n intake
stage two jets stage two hot cam. i was wondering what else i mite need for the up grade, how dependable it is?
 

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They tend to run hot... The 426 kit is MUCH more reliable
 

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I don't have any experience with them, but I've heard the same thing that Red stated.
 

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Welcome to the forums!
 

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Welcome to the forums.
 
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