Walker 31923 Exhaust Flange

Walker 31923 Exhaust Flange for OE-Style Repairs

Walker 31923 is a steel exhaust flange built for exhaust system service where a 3-bolt connection is required. With a 2.65-inch inside diameter, 3.875-inch flange length, and 3.75-inch flange width, it supports a precise exhaust joint on select Chevrolet and GMC heavy-duty applications.

Use this Walker exhaust flange when servicing a 1979-1985 Chevrolet P30, 1979-1985 GMC P3500, 1981-1982 Chevrolet K30, or 1981-1982 GMC K3500 with the listed emission-control exclusions. The natural-finish steel construction and OE-style dimensions help maintain proper alignment at the exhaust connection point.

Key Features

• Part number: 31923
• Steel construction with natural finish
• 3-bolt flange design
• 2.65-inch inside diameter
• 3.5-inch bolt hole center-to-center spacing
• 3.875-inch flange length and 3.75-inch flange width
• 0.32-inch flange thickness for a solid exhaust connection
• Walker exhaust flange for OE-style exhaust service

Detailed Description

Walker 31923 is an exhaust flange engineered for replacement emissions and exhaust repairs where a 3-bolt flange connection is specified. Walker’s OE-focused manufacturing approach supports accurate fit and dependable service across domestic and import exhaust applications, and this flange follows that same OE-style format for the listed Chevrolet and GMC trucks. If you are replacing a worn or damaged exhaust flange on a Chevrolet P30 or GMC P3500, or servicing a Chevrolet K30 or GMC K3500, this part number 31923 provides the dimensional match needed for a proper exhaust seal and connection.

This part cross-references 15501-1 for the same application.

What It Helps Repair

• Exhaust leaks at a damaged flange connection
• Loose or misaligned exhaust joints
• Corrosion-related flange failure
• Service issues on a 3-bolt exhaust connection
• Replacement needs on select Chevrolet P30, GMC P3500, Chevrolet K30, and GMC K3500 exhaust systems

Installation Notes and Tips

• Confirm the flange dimensions, bolt pattern, and 2.65-inch inside diameter before installation.
• Verify vehicle application carefully: Fits 1979-1985 Chevrolet P30, N/A; Fits 1979-1985 GMC P3500, N/A; Fits 1981-1982 Chevrolet K30, N/A; Fits 1981-1982 GMC K3500, N/A.
• Do not use on Federal Emission Control or H5D Emissions applications where noted.
• Check the mating exhaust surfaces for wear, distortion, or corrosion before assembly.

Quality Assurance

Walker focuses on OE-style exhaust and emissions components backed by worldwide OE partnerships and manufacturing capability. That experience supports consistent fitment and dependable replacement performance for Walker 31923 and other Walker exhaust parts.