Buy Caterpillar 7N4470 - COVER AS-ARM at wholesale prices with easy payment and fast shipping options. Save up to 50% OFF OEM pricing. Compatible Machines:- ENGINE - TRUCK Compatible Models:- 3406B Units Containing The Spare Part :- 9Y1664 COVER GP-VALVE MECHANISM (3406B)- 9Y-1664 COVER GP-VALVE MECHANISM (3406B)