jdm engine quality

hey folks, just got back from school where i am breaking down a jdm sr20de that i bought a while ago. i realize there might be a few bad apples around but this one sure as hell isn't. i got the cylinder head off today and what do you know it has flat top pistons(10:1), no big suprise as this is what i ordered. what was amazing was the fact that the pistons are silver in most spots and only light brown otherwise, no carbon to speak of. so i guess this is just a plug for jdm engines, just thought you all would be interested.