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I’ve had em, lifters started clattering & replaced under warranty. You have a 100k warranty….but in all honestly I was praying they’d fail again on my 2015 6.2 (before the deer Jumped out & totaled it) so that I could just yank all that DoD crap as an excuse to do a cam swap (& intake/headers) - after that keep it long term wont have an issue.I will raise my hand on the issues as my 6.2l has had lifters replaced twice in 12k miles. I am trying to trade it on my raptor keeping my fingers crossed it doesn’t happen again before the raptor shows up.