My B18C head was hand ported and polished in Japan; as was every B18C made in Japan. I would like to see an american car take the time out to get so "tedeious". Working in the parts department at Nissan I can say that 90% of the things we get in say "Made in Japan". Radio's, seats, and very few other things will say Mexico or somewhere else. BUT keep in mind 99.9% of the things we get in that are made in a diffrent country are NOT made by OEM Nissan I.E Bose, Clarion etc.