The rockers on a LS series ride on a set of needle bearings. These things can and do fail especially when you have a bigger cam. When they come apart they spill the needles into your engine. The trunion updrade replaces factory setup with a new and improved design that is much more robust and less apt to fail.
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The Krusty Koupe
"Luck favors the oblivious, and boy am I lucky!"
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