Mack MP8 Rocker Arm for a 2013 Mack CXU613

Mack MP8 / Volvo D13 Intake Rocker Arm, Part # 21637266. Replaces 20510623, 21260905, 21534995 & 21819215. All Used Engine Parts Sold With a 30 Day “Parts Only” Warranty. In The Event Of Failure, The Used Engine Part Will Be Replaced Or A Refund Will Be Issued. Warranty Does Not Include Labor Or Progressive Damage. ALL CORES SOLD AS-IS., Serial#: .