Smeding Performance Cylinder Heads are built with one word in focus, PERFORMANCE. Therefore, each head comes standard with many features usually reserved for high end race engines. These include heavy duty 6 bolt castings with extra thick .750” head decks, advanced 11* valve angles for maximum flow & PTV clearance, and our unique 23-8N Super Alloy Exhaust Valve. 23-8N alloy has all the high temp strengths and advantages as the common “Inconel” alloy, but with none of the brittleness. These valves have been proven in turbo combinations approaching 2000* EGT’s.

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