One set of Roller Rocker Arms by Harland Sharp for the 4BT Cummins. These Heavy Duty Rockers will allow more powerful and efficient motor. Each rocker arm is manufactured out of 2024 Billet Aluminum. The Harland rocker is available in stock or increased ratios(contact us for increase ratios)and also features a roller tip for superior friction reduction and increased performance. This is one of the easiest way to maximize your diesel engines valvetrain performance. All parts are manufactured in the USA!
Additional Information:Cummins 4BT Valve Roller Rockers