Mahle F31903 Exhaust Pipe Flange Gasket

Exhaust Flange Gasket for GM HD Applications

The Mahle F31903 exhaust pipe flange gasket is an OEM-standard sealing solution for exhaust connections that need a tight, durable seal. Built with beaded steel and engineered for flange-type joints, it supports reliable exhaust sealing on a wide range of Chevrolet, GMC, and Hummer applications.

Fits 2001-2005 GMC Sierra 3500, N/A and other heavy-duty GM trucks and vans listed below. The F31903 is a direct-fit style exhaust gasket for service work where flange sealing integrity matters.

Key Features

• Beaded steel exhaust gasket material for flange-type sealing surfaces
• OEM Standard item grade for service replacement use
• Designed for exhaust pipe flange and connector gasket applications
• Mahle sealing technology trusted by OEMs and technicians
• Part number F31903 for accurate ordering and catalog matching

Detailed Description

Mahle F31903 is an exhaust pipe flange gasket made for GM heavy-duty exhaust connections where a stable seal is required between mating flange surfaces. The beaded steel construction helps maintain sealing performance under exhaust heat and vibration, while the OEM-standard design supports factory-style service replacement. This part is commonly searched as a Chevrolet Silverado 2500 HD exhaust flange gasket, GMC Sierra 2500 HD connector gasket, or GM exhaust pipe flange gasket for HD trucks and vans. This part cross-references FEL-PRO 61379 for the same application.

Compatible With 2001-2005 Chevrolet Silverado 2500 HD, N/A; 2001-2005 Chevrolet Silverado 3500, N/A; 2001-2005 GMC Sierra 2500 HD, N/A; 2001-2005 GMC Sierra 3500, N/A; 2006 Chevrolet Silverado 2500 HD, N/A; 2006 Chevrolet Silverado 3500, N/A; 2006 Chevrolet Express 2500, N/A; 2006 Chevrolet Express 3500, N/A; 2006 GMC Sierra 2500 HD, N/A; 2006 GMC Sierra 3500, N/A; 2006 GMC Savana 2500, N/A; 2006 GMC Savana 3500, N/A; 2006 Hummer H1, N/A; 2007 Chevrolet Silverado 2500 HD Classic, N/A; 2007 Chevrolet Silverado 3500 Classic, N/A; 2007 GMC Sierra 2500 HD Classic, N/A; 2007 GMC Sierra 3500 Classic, N/A; 2007 Chevrolet Silverado 2500 HD, N/A; 2007 Chevrolet Silverado 3500 HD, N/A; 2007 GMC Sierra 2500 HD, N/A; 2007 GMC Sierra 3500 Classic, N/A; 2007 GMC Sierra 3500 HD, N/A; 2008-2015 Chevrolet Express 2500, N/A; 2008-2015 Chevrolet Express 3500, N/A; 2008-2015 GMC Savana 2500, N/A; 2008-2015 GMC Savana 3500, N/A; 2007-2015 Chevrolet Silverado 2500 HD, N/A; 2007-2015 Chevrolet Silverado 3500 HD, N/A; 2007-2015 GMC Sierra 2500 HD, N/A; 2007-2016 GMC Sierra 3500 HD, N/A.

What It Helps Address

• Exhaust leaks at a flange connection
• Noise from a failing connector gasket
• Soot marks or odor near the exhaust joint
• Loss of sealing after gasket wear or heat cycling
• Service replacement for damaged flange sealing surfaces

Installation Notes and Tips

Inspect the flange faces for warping, corrosion, or carbon buildup before installation. Clean both mating surfaces thoroughly so the beaded steel gasket can seat evenly, and torque the fasteners to the vehicle manufacturer’s specification. Verify the exhaust joint style and match the part number F31903 to the application before assembly.

Quality Assurance

Mahle supplies sealing products used by OEMs and professional technicians worldwide. The F31903 is built to OEM-standard expectations for exhaust sealing performance and fitment accuracy.