Can't comment on the technical issues with the manifold, but I got the infamous ticking on my pentastar a few months ago. 50K miles but 5 years one month of ownership.
. My JKU is just out of the vin range for the recall, but I argued with Mopar and the covered 90% of the charges for all new valves and two camshafts. I'd call the dealer and see what they can do. Mopar Customer Care to get the ball rolling is 800-521-9922