Valve Stem Seal Set L16 L20B 510 620

New set of 8 intake and exhaust valve seals for Datsun 510 and 620, 4-cyl "L" series.  These are stock replacement valve seals. If your car is using oil but you do not see smoke or any dripping these seals might be the problem. The engine can pull oil in past these valve seals which shows very little smoke and mostly occurs under deceleration.