Quote:
Originally Posted by SDT1DYI
Are hollow stem intake valves legal in stock if they were not OEM for the engine? As well is it legal to change valve stems sizes in stock but keeping the same valve angles?
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It is NOT legal to change valve stem size. Not in Stock Eliminator or Super Stock.
But hollow stem valves are legal, even if not originally equipped. We run them in everything, we use Ferrea.