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GSC Power Division conical valve spring set for Porsche 991 Turbo specifies conical springs engineered for that engine application. The set is intended to support valve control demands and accommodate high-rev or upgraded valvetrain components by replacing stock springs with a conical design that manages coil binding and spring harmonics for targeted valvetrain performance in the 991 Turbo platform.
GSC P-D Porsche 991 Turbo Conical Spring Set
