906 PORSCHE PARTS BOOK: https://pbase.com/9146gt/image/154075307

906 Magnesium Upper Valve Cover / Casting Part Number: 901.105.115.10 ~ 901-105-115-10 ~ 901 105 115 10 ~ 90110511510 See here https://pbase.com/image/167366919

906 Magnesium Lower Valve Cover / Casting Part Number: 901.105.116.11 ~ 901-105-116-11 ~ 901 105 116 11 ~ 90110511611 See here https://pbase.com/9146gt/image/156939935

I really need your help while finding a set of 906 Magnesium upper/lower valve covers, 6-bolt. My 906 engine is currently being build and we're hoping to be able to locate the correct set of valve covers. If by chance you have these parts for sale, please email me a AJSERRANO at MSN dot COM. Thank you!

Posted for help here http://www.early911sregistry.org/forums/showthread.php?38766-906-Carrera-6-911R-motors-characteristics&p=970908&viewfull=1#post970908