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670 race
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  1. MXZ / Legend / Summit / Grand Touring / Formula
    Ok fellow dooers. I am by no means a newbie. Just looking for some info only seasoned 670 builders/racers would know. Basically I want to know how to build big power from the 670. I have two motors to choose from. A regular 95 ss 670 and a 95 mach 1 670. I am looking to bump the compression way...
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