Mr. Gasket Head Bolt Washers

Mr. Gasket Head Bolt Washers are engineered for serious engine builders who demand consistent clamping performance and reliable sealing. Manufactured from high-grade, heat-treated steel, these washers are built to withstand the rigors of high-performance street and racing applications alike. The heat treatment process protects cylinder head bosses from damage during installation and ensures each washer maintains its structural integrity under sustained clamping loads.

Key Features:

• Heat-treated high-grade steel construction for maximum strength, durability, and protection of cylinder head surfaces
• Extra thick, precision ground parallel surfaces deliver consistent, even clamp load distribution across the gasket sealing surface
• Chamfered inner diameter accommodates both head bolts and studs for broad installation versatility
• Improves torque accuracy by providing a smooth, flat bearing surface under the bolt head or nut
• Ideal for aluminum cylinder heads where even pressure distribution is essential to preventing gasket failure
• Available in multiple sizes and set quantities to suit a wide range of engine families and configurations

The chamfered bore design allows each washer to be oriented in two directions — chamfered side up to clear the under-head radius of standard head bolts, or reversed for use with studs. This flexibility makes them compatible with a wide variety of engine configurations and fastener types. By spreading clamping forces more evenly across the head gasket surface, Mr. Gasket Head Bolt Washers help achieve an optimum seal in street performance, drag racing, and other demanding builds.

Mr. Gasket has been a cornerstone of the performance aftermarket since the early days of American muscle and is now part of the Holley Performance family. The brand continues to deliver trusted quality across engine hardware, gaskets, and accessories for race cars and muscle cars alike — making this product line a go-to choice among professional engine builders and performance enthusiasts.