Dual valve springs, 8 pieces T1To have a competition camshaft its in most cases recommended to use these stronger valve springs. You can make a choice out of single or dual springs : Single: up to 12 mm valve lift, perfect up to 6000 rpm. Double: up to 16 mm valve lift, perfect up to 7500 rpm. Extra double: Same characteristics as the dual, but they are made out of a material that offers more resistance and is stronger, resulting in higher capacity of the engine. ATTENTION! Due to
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