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Smeding Performance LS3 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 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. Engineered & designed for performance, these Smeding heads are the last LS3 heads you will ever need.
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260cc 11° CNC LS3 Cylinder Heads100% Fully CNC Ported 260cc Intake, 100cc Exhaust & 69cc Chambers Virgin A356 Aluminum Castings 6 Bolt Head Casting with Extra Strength Decks Advanced 11° Valve Angle for Maximum Flow & PTV Clearance 2.165” Intake Valve 21-4N Alloy & 1.60” Exhaust Valve 23-8N Super Alloy 0.210" Intake Free Drop & 0.250" Exhaust Free Drop 23-8N Alloy has the same high temp characteristics of “Inconel” w/o the brittleness Available Complete w/ Chromoly Retainers, Ti Retainers, or Bare w/ Valves...
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255cc 11° Cast LS3 Cylinder Heads255cc Intake, 95cc Exhaust & 69cc Chambers Virgin A356 Aluminum Castings 6 Bolt Head Casting with Extra Strength Decks Advanced 11° Valve Angle for Maximum Flow & PTV Clearance 2.165” Intake Valve 21-4N Alloy & 1.60” Exhaust Valve 23-8N Super Alloy 0.210" Intake Free Drop & 0.250" Exhaust Free Drop 23-8N Alloy has the same high temp characteristics of “Inconel” w/o the brittleness Available Complete w/ Chromoly Retainers, Ti Retainers, or Bare w/ Valves Billet Rocker Arm Stan...