Knowledge Garage

The hub for brake line fittings and sizing: tube nuts, unions, adapters, thread pitch, and how to pick the right line diameter for your vehicle.

Confused by brake-line fittings? This guide breaks down tube nuts, unions, and adapters in plain English, shows when to use each one, and spotlights the must-have 4LifetimeLines SKUs that make every repair quicker, cleaner, and safer.

In this edition of the Knowledge Garage, 4LifetimeLines answers the age old question, "What Size Brake Line Do I Need?".

When there's a sea of parts to sift through, it's important to get a lay of the land. In this post the 4LTL team provides a succinct summary of the types of fittings available on the aftermarket.