Exhaust manifold bolt with acorn head for Cadillac V-16.
Cadillac part number 881838, Group 8.4933 “Screw, exhaust manifold to cylinder”.
Two required per car.
Material: 4140 Steel, heat treat grade 8
Finish: Natural
Thread: 3/8-16
Thread length: .906
OAL: 3.140
Hex: .5625
Length under head: 2.3750
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