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I'm thinking it won't be worth it- maybe a horsepower or two, but you'll more than likely need race gas.
 

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You are right it adds 1.5-3 HP, but it makes it much snappier and rev harder. Race gas is up to you, but I ran one today in 106 deg heat on 91 oct, no problems and we ran it strait for 6hrs, only stopping for gas.
 
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