14mm Porsche Race Series Lug Nuts
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Porsche steel lug nut used to replace the alloy lug nut on all Porsche's with a wheel stud conversion completed. Black Oxide, oiled finish. Now mandated for some car clubs, eg. PCA, NASA, SCCA etc.
M14x1.5mm with R14mm radius ball seat. Never use 'other' ball seat nuts with R13 seat. Use the correct Porsche nuts. Use ACS nuts!