Cylinder head off of a 1987 or later Porsche 928S4. Casting number 928 104 413 1r. Casting number on camshafts 928 105 294 6r and 928 105 292 6r. Intake valves are 37mm in diameter and exhaust are 33mm. head is in excellent condition. This head will work on le... Login to read more.

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