PC-100 On Head Valve Spring Pressure Tester

PC-100 On Head Valve Spring Pressure Tester

Regular price $259.99
Shipping calculated at checkout.

Adjustable on head valve spring pressure tester for various shaft style and stud mount roller rocker systems.

Great for wedge/inline motors, canted/splayed motors, and Big Chief/spread port styles.

The PC-100 features four course adjustment hole locations and includes four fine adjustment shims which enable calibration to within .050" of rocker arm pivot length. Just unscrew the handle and move the load cell module in or out for proper length across the rocker.

This LSM tool comes equipped with a 0-600 lb liquid filled gauge and an 8" long handle. Comes standard with new and improved billet steel rocker hook (HK-003), and includes a set-up and adjustment guide. A high quality, precision tester made in the USA!

When choosing the correct gauge PSI option for your seat pressure, keep in mind that you never want to exceed the gauge limit as it can damage the gauge. Per the specifications of the gauge manufacturer, the most accurate testing location is the middle one third range on the gauge. For example, if your seat pressure is between 250 and 350 you will want the 600 PSI option.

Why choose LSM?

Legendary Heritage

Our company was founded over 45 years ago with integrity and a passion for making the highest quality products.

Made in the USA

With your valued purchase not only are you getting a true quality product, but you are helping support American manufacturing.


We share our love for cars and racing with each product we make. LSM proudly designs and manufactures all our products here in the USA .