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35 to 41.5. I just sold my 35.5 Keihins yesterday off my 421 or I'd have a full setup for you. I still have my intakes and cable if you need.
 

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259 Posts
39 pwk's as well...
 

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34 Posts
i ran 34 pjs on my stock cylinder drag port 4mil and now with the 421 cub i am running 39pwks
 
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