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SDT1DYI · 07-22-2017, 11:03 AM

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?

07-22-2017, 11:03 AM	#1
SDT1DYI Member Join Date: Nov 2016 Location: Indianola Washington Posts: 401 Likes: 0 Liked 453 Times in 146 Posts	Hollow stem intake valves 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?