Mr. Gasket Engine Valve Cover Bolt

Mr. Gasket Valve Cover Bolts: Performance Hardware with Show-Quality Finish

When it comes to fastening down valve covers on a performance engine, the hardware you choose matters more than most builders realize. Mr. Gasket has been engineering engine fasteners and sealing components since 1964, when founder Joe Hrudka began crafting parts tough enough to survive the punishing heat and pressure cycles of drag racing. That same commitment to precision and durability carries directly into their engine valve cover bolt lineup — a range of fasteners designed to seal reliably and look great doing it.

A Lineup Built for Builders

Mr. Gasket's valve cover bolt selection covers everything from straightforward hex-head replacements to eye-catching wing bolt styles favored on show engines and custom builds. Key offerings in the lineup include:

• Chrome Hex-Head Bolt Kits — Classic 1/4-20 x 3/4-inch hex head bolts paired with AN washers for a clean, professional appearance. The AN washers are designed with no exposed shoulders past the bolt head, delivering a finished look that complements polished valve covers.
• Y-Wing Bolt Kits — Chrome-plated for durability and good looks, these wing bolts are engineered with extra-long threads to accommodate Mr. Gasket's own reusable valve cover gaskets as well as thicker custom valve covers. They make valve cover removal fast and tool-free — a practical advantage for engines that see frequent tuning or inspection.
• T-Bar Wing Bolt Kits — A step up in visual flair, the T-bar style features a 5/16-18 or 1/4-20 threaded stud with an extra-long shank, available in chrome-plated steel. Sold in sets of four, these bolts suit both Small Block and Big Block Chevrolet applications.
• Fabricated Valve Cover Hardware Kits — Purpose-built replacement bolt-and-washer sets designed specifically for Mr. Gasket's fabricated 5.7L–6.4L Mopar Gen III Hemi valve covers, ensuring a factory-correct fit with the correct clamp load for aluminum cover flanges.
• Valve Cover Clamps & Hold-Down Brackets — Chrome clamp sets engineered to prevent oil leakage from stamped steel valve covers by reinforcing and flattening the cover flange during torquing — a common weak point on high-mileage or modified engines.

Designed to Work with Mr. Gasket's Sealing System

One of the distinguishing characteristics of Mr. Gasket valve cover bolts is that they are engineered as part of a complete sealing system. The extra-long thread engagement on wing bolt models is specifically sized to work with Mr. Gasket's reusable valve cover gaskets, meaning the hardware and the gasket are designed together rather than as afterthoughts. This integrated approach reduces the guesswork around proper clamp load and gasket compression — two of the most common causes of valve cover oil leaks.

Application coverage spans a wide range of popular platforms, including 1955–1986 Chevrolet 262–400 Gen I Small Block, Chevrolet 396–454 Big Block, and Mopar Gen III Hemi engines. Whether you are refreshing a classic muscle car or building a modern performance engine, Mr. Gasket has hardware sized and threaded for the job.

Chrome Finish as a Standard, Not an Option

For builders who want their engine bay to make a statement, Mr. Gasket's chrome-plated finishes provide a lasting, corrosion-resistant surface that holds up under under-hood heat and repeated cleanings. This attention to appearance without sacrificing function is a hallmark of the brand's engine dress-up philosophy — the idea that performance hardware should be something you are proud to show off, not just hide under a cover.

Explore the full range of Mr. Gasket performance parts or browse all engine valve cover bolts to find the right hardware for your build.