Harland Sharp:

DonÍt trust your custom engine investment to just any rocker manufacturer. Harland Sharp has been manufacturing high performance parts since the 1950Ís and is committed to 100% Made in the USA. All materials are from USA resources. Every machining step is performed in the USA. Every component is assembled in the USA. Quality is built into every rocker arm they make. Beginning with the selection of materials, nine different 2024-T3511 high-quality aluminum extrusions are precision machined to ensure a perfect fit for every application.

Each completed piece is inspected and packed to ensure quality at every step of the process.

Now you know why Harland Sharp Rocker Arms carry a lifetime guarantee against manufacturing defects!

Harland SharpÍs new Heavy Duty Series roller rocker arms utilize similar design concepts, materials and attention to machining quality as the Original Series. These rockers are specifically designed for the heavy spring pressure and the high lift geometry of highly modified engines. The Heavy Duty Series rockers are engineered with wider bodies resulting in increased strength and longevity. When your engine requires extra durability, rely on the Harland Sharp Heavy Duty Series.

Special Features:

Will not work with center bolt valve covers, unless the valve cover baffles are removed.
Clears up to a 1.630 diameter valve spring.

Special Notes:

* If you are using late model LT1/LT4 self aligning cylinder heads, you will need to install pushrod guide plates and 7/16 studs for the rockers to work properly.
* If you are using a spring any larger than 1.560 with a 7/16 rocker stud, Harland Sharp recommends our "Heavy Duty" 7/16 series roller rockers.
* When using head studs additional clearance may be necessary for rockers to fit properly.