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!

The premier Diamond Series is the latest addition to the Harland Sharp roller rocker arm family of products. Harland Sharp recognizes that every gram of weight eliminated from the reciprocating mass helps to increase net horsepower. Over 100 grams of weight have been removed from the Original series rockers while maintaining Harland SharpÍs high standards of production quality. Now you can increase the engine Horsepower/RPM quicker and compete with a reliable, lightweight valve train. The Diamond Series is the solution for the engine builder or serious racer requiring every possible weight and output advantage.

Special Features:

Eliminates as much as 100 grams of moving mass from your vale train
Fits Center bolt Valve Covers with slight modifications to the covers.
Designed to clear up to a 1.560 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.