Seal your braking system the right way with this 1965–1966 Master Cylinder Cap Gasket, designed to provide a tight, leak-resistant seal for your classic Mustang.

This gasket installs beneath the master cylinder cap to help prevent brake fluid leaks and protect against moisture and contamination. Manufactured from brake fluid–resistant rubber, it’s built to maintain flexibility and durability over time—ensuring consistent performance in your classic Ford Mustang.

Product Details:

• Application: 1965–1966 Ford Mustang

• Location: Master Cylinder Cap

• Function: Seals brake fluid reservoir

• Material: High-quality, brake fluid–resistant rubber

• Fitment: Direct OEM-style replacement

Over time, original gaskets can become brittle, crack, or shrink—leading to leaks and potential brake system contamination. Replacing this simple but critical component helps maintain proper hydraulic pressure and protects your braking system.

Perfect for restorations, routine maintenance, or master cylinder service, this cap gasket is a small investment that delivers reliable protection and peace of mind.

Keep your classic braking system sealed and secure—order today!