Hi, and thanks for the interest in these aftermarket L14 an L16 Datsun 83 mm .020 and .030 mm size is 50 and 75 mm over size. please state witch oversize needed and to see that we still have your size. Stored for some time, NOSR an are nice, please check your piston and application,I do the best I can but some times could make a mistake. Buyer can get the complete set when available. (Sold One each) L14 an L 16 are same stock numbers and same 83 mm. I have at lest one full set of 0.20 and 0.30