[KingLT1]

Originally Posted by FalconerOneSeven

Cool read for people like me that always wondered about the differences between both engines.

I learned notably that the manual ZL1 doesn't have the AFM (cylinder deactivation).

https://www.hotrod.com/articles/grit...20of%203.1%3A1.

The LT5 is the only gen 5 LT engine that has 16 standard hydraulic lifters in the engine with no AFM hardware. All of the other LT engines L83,L86,LT1, LT4 have AFM internals but it isn't active on some models.