DHM High RPM Valve Spring Set for the Honda Grom

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After years of not locating the ultimate valve spring, we decided to have our own made. These springs can handle 12k+ RPM with any camshaft available and have been designed to not need an inner spring in order to keep valvetrain weight low. Compatible with stock or our titanium spring retainers for the ultimate float-proof valvetrain setup. Fits: 2014-2020 Honda Grom/Monkey Show more