Harland set up shop as Custom Speed Parts and continued to improve upon his initial rocker arm design. A new needle
bearing fulcrum and roller tip continued
to add horsepower and reduce friction in the racers
engines. Custom Speed Parts grew as Harland supplied
his rocker arms to many cam grinders and engine
builders. As his company grew, so did the challenges
for additional performance increases. To add strength
and stability, Custom Speed Parts introduced the
first 7/16" stud small block Chevy rocker arm and first
big block Chevy roller rocker.
About us
As the world of racing has continued to change
 throughout the decades, Harland Sharp has yet to lose focus; Providing our customers with the highest quality Made in USA performance parts is still our #1 Priority!

Our founders’ principal of "Made In America" has
never been more instilled in our products than today.
We take pride in knowing that your aftermarket valvetrain parts are coming right from the USA and NOT overseas. Unlike many of the other big-name brands out there, Harland Sharp has yet to lose focus of what we know you are looking for in the highest quality performance parts,
Made In USA, which we are fully committed to.

As a small family owned & operated business,
Harland Sharp still individually, hand inspects and
packs each rocker arm before it leaves our shop
and is sent to you. With a lifetime guarantee against manufacturing defects, it is no wonder that more
 racers choose Harland Sharp than any other brand.