Seller notes

NR Racing Heavy Duty Valve Springs - PairFits Honda GX240, GX270, GX340, and GX390s, and 420 PredatorsApproximately 48lb at 1.15"1.57" free heightThese springs are highly recommended when removing your stock governor! Without them, the engine will not rev much past 4500, and the stock valves will float, eventually causing engine damage. Commonly used in Karting, Mini Bike, and other high performance applications!...

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