Modified Valve Springs

Learn how to choose the right valve springs for your camshaft, the differences between single and dual valve springs and when to replace them.

There's a new spec engine option for the 2025 IMCA Modified season. Here's what you need to know.

How proportioning valves work, fixed vs adjustable valves explained, and how to reset a prop valve.

Adjustable suspensions allow for big changes to a car's stance and handling characteristics, but it's important to understand some suspension tuning principles before making big changes to the suspension under your custom or race car.

Learn how to mount a traditional transverse rear leaf spring. These tips will help the installation run smoothly and successfully.

Learn how to install and properly tune brakes with an adjustable proportioning valve block.

Check out some cool overhead conversions to the Ford flathead V8 on display in the Museum of American Speed!

How do you know what brand of shocks to purchase? How many shocks do you actually need as a beginner? In this article, Austin explains what to look for when it comes to brands, pricing, and features in the suspension world.