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hey there, been a while since this thread has had any additions. I have an lq4 that was pulled out of a 2007 silverado classic. No DOD/AFM. Appears to be Gen 4 rotating assembly, and the pistons also have the fly-cuts!
It happens.....
No LQ4 engines had AFM/DOD as they are Gen III, and later ones did have the Gen IV style lower end parts.