ARP bolts and studs have rolled threads.
I wonder if this batch just happened to be slightly undersize in diameter and were overlooked by Quality Control...
I'd mic the stud diameter (and pitch diameter if possible) and compare those measurements to a known good one.
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2017 Camaro RS -217 cu in 365 HP w/8 speed auto
1967 Camaro SS -5.3L LS w/4L60E & 4.11 12 bolt
2019 Cadillac XT5 3.6L V6 w/310 HP & 8 speed AWD
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