Before I go jumping to conclusions...wouldn't my truck miss/have a cel if it had a broken rocker? I've got the thumping intake (sometimes its quite and other times its louder)noise but, the truck drives fine. It's a 08 6.4 by the way. Thanks
FWIW i was able to get my valve bridges as well as several other things from my local ford dealer. Just had to give them the last 8 of my vin so they could pull up the correct break down diagrams.