Truck 6.4

mbaird said

The opening post made it sound like they would be a more difficult install.
I am not all that familiar with gen3 other than maintenance on my ram.

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It is very tight, but they do fit. Not the most glorious job in the world to do, but, there's worse things. They in fact are the ONLY thing that seems to fit. 2010-2011 Jeep Grand Cherokee 5.7 manifolds fit, but, will be waaaay to restrictive on your 6.4.