This product replace the cast original output flange with this billet machined output flange which accomodates the popular 1350 Yoke and Supra patterns. Integrated tone ring if you want to have a external speed reference, comes as standard. Installation is straight forward, no cutting required of the output shaft center pin. Made out of SS2541. Comes with new bolts and new center nut. Pilot included to perfectly center the Supra MK4 propshaft to this flange.