These 155 lb conical beehive springs include retainers and locks for 12-valve Cummins builds with moderate cams and stock-size valves. Review the installed-height specifications; larger valves, more lift or operation above 4,500 RPM may call for the dual spring kit.
The 24-valve 188/220 combo includes the camshaft, heavy-duty pushrods, 103 lb valve springs and tappets. For a VP44 truck, our application guidance points to the 24-valve 178/208 combo; read the turbo and clearance notes below before choosing.
OEM-style rocker arms for 1998.5–2018 24-valve Cummins engines. Swaged steel tips, DLC-coated trunnions, revised oiling and an updated casting. Have a modified valvetrain? Check your combination with Hamilton Cams before ordering.
The steel 188/220 cam is listed for drag-strip and stock-class pulling applications. It requires at least two bushings in the cam tunnel, plus the piston-to-valve clearance checks detailed below.
These 1.45-inch DLC-coated steel tappets are intended for high-RPM builds using 110 lb or heavier valve springs. Choose them as part of a matched camshaft and spring combination; contact us if you need help confirming the setup.
Our 110 lb seat-pressure springs are for 24-valve Cummins competition builds running above 4,500 RPM. They are not recommended for daily drivers. A steel cam and steel tappets are recommended for this combination.
12-Valve Spring Compressor Tool – Simplify Valve Work on Your 5.9L Cummins Make valve spring maintenance a breeze with our 12-Valve Spring Compressor Tool, specifically...
The 12-valve dual spring kit includes retainers and 10-degree locks for builds needing more spring capacity than a single-spring setup. Have your machine shop verify installed height and review the valve-stem seal requirements below.
Our 188/220 cast cam is intended for daily-driver and light-competition Cummins builds, with a listed operating range of 1,700–4,500 RPM. Check the piston-to-valve clearance requirements below before choosing this grind.
