The more I think about it, I really don't think headers are worth that much. U may pay for quality craftsmanship, but I don't c a point in payin so much for a header unless ur goin all out... If u think about it, the cheap copy ones, like obx r pretty much the same as ur $800 ones. I'm not condoning copycats, but that's Reality. Also, if u think about it, its jus a piece of bent metal tubes welded together, claimin to make xxx hp. Marketing or research data will usually determine which products r popular. I would probably use that money to port match everything. But to answer the question, Like the others say, if u want expensive(best) asp. I think Gspec has one o their website. I think JUN auto made one back in the day that probably has some good results given all the right conditions. Didn't someone try to fit a type r header and made it work??