QSK19 Cummins Cylinder Head 3646323 Parts Catalog Ref No. Part Name Part No. Required Cylinder Head 3646323 6 1 Valve Spring Retainer 205094 4 Intake Valve Kit 2881836 2 2 Intake Valve 4986317 1 3 Valve Collet 205091 2 4 Valve Rotator 3640315 4 Exhaust Valve 3803528 2 3 Valve Collet 205091 2 5 Exhaust Valve 3088389 1 6 …