AP Exhaust 8403 Exhaust Pipe Flange Gasket

Exhaust Pipe Flange Gasket for GM Compact Cars

AP Exhaust 8403 is an exhaust pipe flange gasket built for sealing the joint between exhaust components at the flange connection. With a 3-9/32 inch inside diameter, 4-15/32 inch bolt-to-bolt length, and 3-bolt pattern, it is sized for specific GM applications that need a precise flange seal. AP Exhaust 8403 is a direct-fit service part for select Chevrolet, Pontiac, and Saturn models.

Key Features

• Exhaust pipe flange gasket for sealing a flanged exhaust connection
• 3-bolt design for the specified application
• Inside diameter: 3-9/32 inches
• Bolt-to-bolt length: 4-15/32 inches
• AP Exhaust 8403 for targeted replacement use

Detailed Description

This AP Exhaust 8403 gasket is made for exhaust flange joints where a tight seal is needed between pipe sections. It is a fitment-based replacement for 2005-2010 Chevrolet Cobalt, 2006-2011 Chevrolet HHR, 2007-2010 Pontiac G5, 2003-2007 Saturn Ion, and 2005-2006 Pontiac Pursuit. It also fits 2006-2007 Chevrolet Cobalt, 2006-2007 Chevrolet HHR, and 2005-2007 Chevrolet Cobalt with the listed transmission notes. The part number 8403 is useful when matching the flange dimensions and bolt pattern to the original exhaust connection.

What It Helps Fix

• Exhaust leaks at the flange connection
• Noise from a failing exhaust seal
• Soot or residue around the pipe joint
• Loss of sealing after exhaust service
• Fitment issues when replacing a worn flange gasket

Installation Notes and Tips

Confirm the flange pattern, inside diameter, and bolt-to-bolt length before installation. Clean both mating surfaces thoroughly so the gasket seats evenly, and inspect the flange for warping or corrosion that could affect sealing. Verify vehicle-specific notes before ordering, especially for 2006-2007 Chevrolet Cobalt and 2006-2007 Chevrolet HHR applications with automatic transmission. For search accuracy, this AP Exhaust 8403 gasket is commonly referenced for Chevrolet Cobalt, Chevrolet HHR, and Pontiac G5 exhaust flange service.

Quality Assurance

AP Exhaust 8403 is a cataloged exhaust sealing component built to match the listed dimensions and vehicle applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.