Cummins L10, Valve Covers, (GOOD USED) Cummins L10 Valve Cover 3080373 For Sale, Plain or No Fill Hole Part # 3080373, Front Fill Hole Part # 3080375, Rear-Fill Hole Part # 3080377, Firing Order 1-5-3-6-2-4, U.S Patents: 4244330, 4369627, 4257370, 4237847, 4294073, 4345552, Also Fits ISM & M11, Stock # 6532 | Tested & Inspected!