here we are, brand new, never used authentic 2wd yb head, found of facebook of all places! i sent the serial numbers to cosworth and they confirmed that it was manufactured back in 2008 and shipped to the states. the bloke i brought it off gave me his purchase history, he bought it in 2012 for a project that never went ahead so he shelved it. he paid 5k including shipping and tax for it! I paid 2k