New rear differential front pinion seal. This seal will fit Datsun cars with R180 and R160 rear differential. The R180 was the standard rearend on most all 240Z, 260Z, and 280Z, 1970-1978. This seal is for the pinion gear where the driveshaft hooks up.
*Note this seal is 67mm O.D., we have seen some 1968-69 510 cars with a smaller seal so please check yours before ordering.