View 15 Photos View 0 Videos Mack MP8 Rocker Arm for a 2011 Mack CXU613 $350 USD Good used Rocker arm and shaft from a Mack MP8 engine. The rocker arm moves back and forth freely. The rollers are in good condition. The casting number is 21228650, 21260905, 21081489,... ConditionUsedFits To Make(s)MackFits To Model(s)CXU613Will Fit Year(s)2011Part Number240620-30Stock Number240620-30 MLS Number14283898CategoryRocker Arms Last Updated4/3/2026 LocationKankakee, IL, US Sold ByRiver Valley Truck Parts (844) 604-___ SHOWNUMBERCall Seller Email Seller Save More Info