Dorman 03422 Exhaust Manifold Stud and Nut

Exhaust Manifold Hardware for OE-Style Repair

Dorman 03422 exhaust manifold stud and nut hardware is built to match the fit and function of the original fasteners used on specific vehicles. It provides a direct replacement solution for manifold service on applications such as Chevrolet Malibu, Buick Regal, and GMC Terrain, where accurate thread engagement and secure clamping are important for a proper exhaust seal.

Made from steel with a zinc clear chromate finish, this hardware is intended for standard replacement use and is engineered for dependable service in exhaust manifold repairs and installations.

Key Features

• OE-style exhaust manifold stud and nut hardware for specific makes and models
• Steel construction for strength in high-heat exhaust applications
• Grade 9.8 bolt grade for consistent fastening performance
• Zinc clear chromate coating for added corrosion resistance
• Coarse thread design on both stud ends and nut thread
• Flange lock nut design helps maintain clamp load
• Cross-references Dorman 03422 with OE numbers 11589054 and W702586S437 for the same application

Detailed Description

Dorman 03422 is a standard replacement exhaust manifold stud and nut set designed to restore the original hardware fit on a wide range of GM vehicles. The steel stud measures 50.75 mm in length and uses coarse threads on both ends, while the matching steel flange lock nut features an 8 mm coarse thread and 13 mm thickness. This hardware is a practical choice for exhaust manifold service on vehicles including Chevrolet Equinox, Chevrolet HHR, Pontiac G6, Saturn Vue, and Buick LaCrosse. The Dorman 03422 part number is commonly searched by owners needing exhaust manifold stud and nut replacement for these applications.

Common Repair Uses

• Broken or stretched exhaust manifold studs
• Loose manifold-to-cylinder-head fastening
• Exhaust leaks at the manifold flange
• Corroded or seized original manifold hardware
• Manifold installation after exhaust service or engine repair

Installation Notes and Tips

Verify thread size, stud length, and vehicle application before installation. Clean the mounting surfaces and threaded holes thoroughly so the new hardware seats correctly. Because exhaust manifold fasteners operate in a high-heat environment, follow the vehicle service procedure for torque sequence and final torque specification. For fitment-based searches, this part is listed for 2011-2017 Buick Regal, 2008-2017 Chevrolet Equinox, 2010-2017 GMC Terrain, and 2007-2011 Chevrolet HHR, among many others. The Dorman 03422 exhaust manifold stud and nut is also listed for 2002-2010 Saturn Vue and 2006-2010 Pontiac G6 applications.

Quality Assurance

Dorman manufactures replacement hardware to match original fit and function on specific vehicles, supporting accurate repairs with application-specific exhaust fasteners. This part is built as a standard replacement for manifold service where correct thread engagement and secure clamping are required.