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Alan Roehrich · 03-20-2014, 07:40 PM

Evidently. The rule book says that stainless can replace regular "steel" valves, the stem diameter and head diameter must match the OE spec in the guide, titanium is only legal if the OE part was titanium, and the stems may not be filled unless the OE part was.

Hollow stem undercut stainless valves with OE diameter heads and stems have been passing tech for some time now.

03-20-2014, 07:40 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,124 Likes: 1,581 Liked 1,875 Times in 422 Posts	Re: Stocker Valves Evidently. The rule book says that stainless can replace regular "steel" valves, the stem diameter and head diameter must match the OE spec in the guide, titanium is only legal if the OE part was titanium, and the stems may not be filled unless the OE part was. Hollow stem undercut stainless valves with OE diameter heads and stems have been passing tech for some time now. __________________ Alan Roehrich 212A G/S