These are the Kingpins with Nuts for the RJ Speed Legends Spec Coupe Kit and Spec Sedan Kit. FEATURES: Steel construction, gun metal in color Replaces worn or damaged kingpins INCLUDES: Two kingpins with nuts REQUIRES: Installation following the model manual SPECS: Length: 27.16mm (1.07") Diameter: 3.16mm (0.12") RJ SpeedPart RJS5377