If the only room between the valves is room for your Fingernail, then they are Big Valve Heads. In other words, if there is no more room for anything bigger, that is big enough
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Title: Big Valves
Description: If the only room between the valves is room for your Fingernail, then they are Big Valve Heads. In other words, if there is no more room for anything bigger, that is big enough
