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Designed for 400 to 440+ CID engines, the VFactor 23° Large Bore SBC Cylinder Heads start with a premium Aerospace Specification A356 (Primary Virgin Ingot) aluminum casting that is semi-finished by Profiler Performance. These castings, originally developed by Darin Morgan with custom head porters in mind, are both light weight and extremely corrosion resistant and feature a solid rocker pad for improved valvetrain stability, and a revised spark plug location to improve flame travel. Utilizing a semi-finished casting allows us the flexibility to offer 5/16”, 11/32” or 8mm valve stem sizes, and standard ductile iron, Durabond Killerbee or Moldstar 90 valve seats depending on the application.
Hand finishing by Speier Racing Heads is also available for those needing heads custom tailored to their application and combination. VFactor Heads can be purchased bare or fully assembled.
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