i don't understand why OEM JDM extractors would be worth the money when upgrading. correct me if im wrong, but are they not stock, with power restrictions. everyone in jap might as well have no gone aftermarket, and then no mugen no spoon no this no that. so before you believe everyone talking it up about JDM with no experience at all, think about it, and get something that is worth the money. and btw xforce is pretty shit too. when u want to get headers, its not something u want to go CHEAP about, because going cheap will never be worth it. the top brands are expensive for a reason, because they have PROVEN gains, not gains by some internet guys who reckon JDM STOCK headers are a good upgrade and it FEELS better