I know the diffences between the US and JDM motor. But besides the smaller turbos, egr, cams, ect...on the JDM. How else can you tell that is a US spec motor? How can you tell the difference between the US motor vs JDM motor besides the things I have listed above? Is there a stamped on the motor that says US or JDM? I have searched but It just mentioned the things I have listed.