Piston Grade

[gladiatorschool]

Ok so im trying to find what the grade piston is in my car. According to Nissan parts there are a few different grades and the 4 digit code starting with ST is stamped on the block. I have been looking all over n haven't found it. Can anyone tell me where it would be

[mrodrig2]

Not sure what you are referring to by "piston grade," but Courtesy Parts lists only one piston assembly and it is common to both the 2.5 and 3.5.

[crayzitalian3]

i was lookin to do up my internals by swapping in sentra se-r spec-v parts, but there was more than one for some of the parts i was looking for so i gave up lol

check out those if you want to upgrade or something