Performance L Engine Reinforced Rear Crankshaft Seal 1970-83 (240Z/260Z/280Z/280ZX) 1968-73 (510) 1970-72 (521) 1972-73 (620)

This Performance Rear Crankshaft seal is made with a stronger inner spring to help seal under higher combustion pressure. This seal is 13mm deep, while the OEM Nissan seal is just 8.5 mm deep.