Harland Sharp D-Force Roller Rocker Arms are manufactured in-house out of 2024
Billet Aluminum to ensure maximum strength and durability for your Duramax valvetrain. The D-Force roller rocker arms also
feature a roller tip for superior friction reduction and increased
use in racing applications, and with no required modifications, the
D-Force roller rocker arms from Harland Sharp truly are the simplest way
of maximizing your diesel engines valvetrain performance!