Mr. Gasket Engine Valve Cover Bolt Kit

Mr. Gasket Engine Valve Cover Bolt Kits: Race-Proven Hardware for Every Build

When it comes to fastening hardware that blends form and function under the hood, few names carry the weight of Mr. Gasket. Founded in 1964 by drag racer Joe Hrudka — who used his own '57 Chevy as a rolling test bed — the brand was built on a simple premise: fasteners and sealing hardware that could withstand the punishing temperatures and pressures of high-performance racing. Decades later, that same DNA is evident in every engine valve cover bolt kit the brand produces.

A Range of Styles Built for Performance and Appearance

Mr. Gasket's valve cover bolt kit lineup is anything but one-size-fits-all. The range spans several distinct fastener styles to suit both daily drivers and dedicated race builds:

• Chrome Y-Wing Bolts: The iconic standard Y-top wing bolt, offered in 1/4-20 x 5/8 in. sizing for stock valve covers on Gen I Small Block and Big Block Chevrolet applications. Chrome-plated for beauty and durability, these wing bolts make valve cover removal fast and easy.
• T-Wing & T-Bar Wing Bolts: Chrome-plated steel T-wing and T-bar variants featuring extra-long studs — up to 5 inches — engineered to accommodate thicker aftermarket valve cover gaskets and custom valve covers. These precision-engineered bolts feature extra-long threads to work seamlessly with Mr. Gasket's own re-usable valve cover gaskets.
• Hex Head Bolt Kits: Chrome valve cover bolt kits featuring 1/4-20 x 3/4 in. hex head bolts paired with 1/4 in. AN washers — four per set. The AN washers are designed with no exposed shoulders past the bolt heads, giving them a clean, professional appearance in any engine bay.
• Acorn-Style Nuts & Studs: Bullet-tip stud kits with zinc-plated self-locking nuts that hold the cover gasket in position and assure a more positive seal — a detail that reflects Mr. Gasket's sealing heritage.
• Gen III Hemi Fabricated Hardware: Replacement valve cover hardware specifically designed for the 5.7L–6.4L Mopar Gen III Hemi, including sets of 10 or 20 bolts with matching washers in silver or black finishes, engineered to pair with Mr. Gasket's fabricated 6061-T5 aluminum valve covers.

Integrated System Design: Bolts Built for Mr. Gasket Covers

One of the key advantages of choosing Mr. Gasket valve cover bolt kits is how thoughtfully they integrate with the brand's broader valve cover ecosystem. Whether you're running a set of Mr. Gasket's fabricated aluminum Gen III Hemi covers or a classic Small Block dress-up lid, the bolt kits are engineered with thread lengths and hardware dimensions that match. This isn't coincidental — it's the result of a brand that has been producing both covers and fasteners in tandem for decades, now as part of the Holley Performance family of brands.

Coverage Across America's Most Iconic Engines

The Mr. Gasket valve cover bolt kit lineup covers a wide swath of classic American performance platforms, including Chevrolet Gen I Small Block (262–400 cubic inch, 1955–1986), Big Block Chevrolet (396–454), GMC truck applications, and the modern Mopar Gen III Hemi (5.7L–6.4L). Whether you're restoring a 1967 Camaro, building a dedicated drag car, or freshening up a Hemi-powered muscle truck, there's a bolt kit designed to do the job right.

Explore the full Mr. Gasket brand catalog for the complete range of gaskets, seals, and engine dress-up hardware, or browse all engine valve cover bolt kits to find the right fastener style and finish for your application.