My engine is stamped B16A proofing that it is JDM. JDM engines are reffer with #s to show the generation it is from because each generation gives out different HP (just no stamped #). My engine was bought and imported from japan from a shop in Chicago and was stated as a 00 SIR B16. I just added the 2 because I though it was meant to be OBD2 but I guess I was wrong. I will post pic for proof.