Seems I've got a vacuum leak coming from a couple of injectors on the back side. I'm running green top 42's on an 06 L32, so do I get Ford or stock GTP o-rings? and is there a difference in size from top and bottom rings?--noticed that Rock Auto has a set of 06 L32's that has blue and black o-rings from AC Delco that look the same size but Mahle has different part #'s for upper/lower and pic shows that lower seem thinner. If I need Ford orings, anyone have a part number? Thanks
link to Rockauto orings: http://www.rockauto.com/en/catalog/p...r+o-ring,13679
