hi i did a search and my queastion is still un answered, i would like to know if there is any way of tell the difference between usdm and jdm itr pistions just by looking at them,(meaning is there markings on one that is different from the other). If anyone can pls answer this for me that would be great, and if this is the wrong forum then pls direct me to the right one, i asked this queastion in the itr forum and no one answered, and TIA

 

The code for USDM ITR pistons is P73-A0
The code for JDM ITR pistons is P73-00

Some are marked, some are not. Its according to who made the pistons. The stock replacements I bought were marked.

 

And also the dome peak on the JDM piston is higher. You would have to have the two next to eachother to see it though.

 

so the nippon pistions that i see on ebay are not jdm