Walker 31591 Exhaust Pipe Flange Gasket

Walker 31591 Exhaust Pipe Flange Gasket

Walker 31591 is a 4-bolt exhaust pipe flange gasket built for sealing exhaust joints on select Chevrolet Silverado 2500 HD, Silverado 3500, Silverado 3500 HD, GMC Sierra 2500 HD, Sierra 3500, and Sierra 3500 HD applications. It uses high-temperature graphite with a steel core and metal fire ring to help maintain a tight seal at the flange connection.

Key Features

• 4-bolt exhaust pipe flange gasket design
• High-temperature graphite construction with steel core
• Metal fire ring for added sealing at the exhaust joint
• Port size: 3.5 in. x 3.5 in.
• Bolt hole center spacing: 4.75 in. and 3.25 in.
• Bolt hole diameter: 0.5 in.
• Thickness: 0.051 in.
• Walker 31591 is designed to work with OE exhaust components and Walker aftermarket replacement parts

Detailed Description

This exhaust pipe flange gasket is made for sealing the connection between exhaust components where a 4-bolt flange is used. The graphite sealing material, steel core, and metal fire ring are selected to handle exhaust heat and help maintain a secure seal under operating conditions. Walker 31591 is a direct-fit style replacement for service work on 2001-2006 Chevrolet Silverado 2500 HD and Silverado 3500, 2001-2006 GMC Sierra 2500 HD and Sierra 3500, plus 2007 Chevrolet Silverado 2500 HD Classic and Silverado 3500 Classic, and 2007 GMC Sierra 2500 HD Classic and Sierra 3500 Classic. It also fits 2007-2010 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD, except Chassis Cab.

This part cross-references Anchor 9119 for the same application.

What It Helps Fix

• Exhaust leaks at a 4-bolt flange connection
• Noise from a leaking exhaust joint
• Soot or residue around the flange area
• Loss of sealing after exhaust service or component replacement
• Fitment issues when replacing a worn flange gasket on Silverado and Sierra HD trucks

Installation Notes and Tips

Inspect the flange surfaces for warping, corrosion, or debris before installation. Clean both mating surfaces thoroughly so the gasket can seat evenly, and verify bolt hole spacing and port dimensions against the existing exhaust connection. Confirm vehicle application before ordering, especially on 2007-2010 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD models with the Chassis Cab exception.

Quality Assurance

Walker supplies exhaust gaskets and flanges in styles and sizes intended to match OE exhaust components and Walker replacement parts. Part number 31591 is built for exhaust sealing service where a durable flange gasket is required.