Mr. Gasket Brass Freeze Plug Kit

Mr. Gasket Brass Freeze Plug Kits are the premium solution for eliminating the risk of rusted-out engine expansion plugs. Manufactured from corrosion-resistant brass, these kits deliver a significant durability advantage over standard OEM-style steel plugs — making them the preferred choice for any application where moisture and corrosion are ongoing concerns.

Originally engineered with marine applications in mind, Mr. Gasket brass freeze plug kits are equally well-suited for long-term vehicle storage, classic car restorations, full engine rebuilds, and everyday street use. The brass material resists oxidation and deterioration far longer than steel, helping protect the engine block against coolant leaks and freeze-related damage caused by insufficient antifreeze protection.

Key Features:

• Premium brass construction for superior corrosion resistance over standard steel expansion plugs
• Protects the engine block against freeze damage and coolant leaks
• Ideal for marine environments, long-term storage, restorations, and daily drivers
• Each kit includes all plugs required for a complete engine block installation
• Direct replacement for factory freeze plugs — also known as expansion plugs or Welsh plugs
• Suitable for engine rebuilds, fresh builds, and preventive maintenance upgrades
• Multiple kit configurations available to cover a wide range of engine families

Backed by decades of performance heritage, Mr. Gasket has been a trusted name in sealing solutions since 1964. Now part of the Holley Performance family, Mr. Gasket continues to deliver the quality and reliability that engine builders and enthusiasts have depended on for over half a century. Whether you're protecting a freshly rebuilt engine or upgrading an existing one, the Brass Freeze Plug Kit is the smart long-term investment over conventional steel alternatives.