Mr Geoff over at full race builds these trucks into high performance beasts, he’s adding stress that factory parts were never designed for. Specifically, the increase hp/tq increases the engine rate of acceleration, which inceases the slack on the “pushed” side of a timing chain, so the tensioner works harder to maintain tension. Then you whack the throttle shut and all the push goes away, the slack side of the chain the tensioner was just shoving into gets tight, so it momentarily shoves the guide into the tensioner, much harder than what a stock engine would do. So I could see this happening over time.
Conversely, we have
@FordTechOne who doesn’t see this issue ever because he works at a dealer and likely at most sees truck with basic bolt on mods and a tune at most.
But yeah, the part is junk