Not sure about this one. Original from the factory with the 6.0 DOHC heads and AMG tuned, but converted by RennTECH to the SOHC heads? That doesn't add up. Looks nice though. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4531534013&category=6336 David