Cummins 8.3L 6C 6CT 12V Cylinder Head, 21" Air Intake Opening, Brand New, Bare, 3991155

21 inch air intake. Please check casting before ordering
If your engine is in a marine application and has a 21" Air Intake Opening, please order part number 4942463 instead.
Casting Numbers: 3902382, 3902711, 3904688, 3911286, 3912628, 3916430, 3916431, 3919764, 3920023, 3920024, 3920028, 3920029, 3921050, 3921051, 3936152

Replaces: 3802259, 3802261, 3802465, 3802467, 3903220, 3908419, 3909971, 3911287, 3912628, 3912629, 3913111 , 3916431, 3916432, 3916433, 3916435, 3916464, 3916469, 3917768, 3920027, 3925642, 3925644, 3936180, 3936263, 3936271, 3936280, 3939345, 3957948, 3959562, 3959564, 3968902, 3968930, 3991152, 3991155, 3991158, 4089290