Dongfeng Cummins Mechanical Engine L Series with 24-Valve Cylinder Head,Heavy Duty Feactures,Durable and dependable, 24-Valve Cylinder Head for increased air flow,improved low-end torque and response,higher power density,improved fuel consumption and improved emissions.Heavy Duty Features Replaceable wet liners,roller followers,2-piece steel articulated pistons,by-pass oil filtration and targeted ...