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The top hat used in the suspension clevises on Ralph Firman Racing (RFR) cars. It is machined from 4130 chromoly steel and heat treated for extra hardness, and its bore fits a 5/16 in. AN5 or NAS grade bolt.
Each clevis takes two top hats, for example the 10D2013 rear lower wishbone to gearbox clevis. Sold individually, so order two per clevis.
