How do they work? Are they illegal?

Semi-truck parts tend to wear out faster than passenger car parts. That has a lot to do with the size of the vehicle and the fact that big trucks rack up a lot of miles quickly. Some auto parts, like Jake brakes, can improve the life of a truck. Learn more about Jake brakes, including how they work, whether they’re legal, and whether they affect a truck’s engine.

What is a Jake brake?

Kenworth Semi Trailer | Kenworth

Jake brakes are designed to prevent service brake wear. If used correctly, they can add years to a truck’s brakes. They also save tire wear.

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