Detroit Diesel 60 Series 12.7L Engine Rocker Arm 23523166 From 2004 Freightliner Century Class VIN 1FUJBBCG14LM93266. WEST SIDE TRUCK PARTS. Please LOOK At My Pictures For Exact Details! For More GREAT DEALS! Part Fitment & Interchange. Please check with your local dealer to see if my part will work for your application.