Mack 466GC394M Rocker Arm Shaft PAI 3518CROSS REFERENCE: 4103 5010284937 466GC394M 466GC4103 5010284937 APPLICATION: Mack E7 E Tech Aset Multiple Use Application. DETAILS: Shaft Rocker Arm Non Dynatard Length: 15. 96in BRAND: PAI 3518 Mack 466GC394M Rocker Arm Shaft PAI 3518. Replacement parts and aftermarket parts. Stabilizes rocker movement and supports reliable valve train operation. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified