AP Exhaust 700338 Exhaust Muffler - Rear

AP Exhaust 700338 Rear Muffler for Regal

AP Exhaust 700338 is a rear exhaust muffler built for direct-fit service on 1997-2004 Buick Regal applications. It uses an oval aluminized steel body with a baffled muffler design and OE-comparable sound level for a factory-style replacement on the Regal rear exhaust position.

Key Features

• Direct-fit rear muffler for 1997-2004 Buick Regal
• AP Exhaust part number 700338
• Oval body construction in aluminized steel
• Baffled muffler type with OE-comparable sound level
• Single 2.25 in. inlet and single 2.25 in. outlet
• Right lower inlet location and center lower outlet location
• Overall length: 29 in.; body dimensions: 7 in. H x 14 in. L x 9 in. W

Detailed Description

This AP Exhaust muffler is part of the MSL series and is configured as an AA muffler type for rear installation on the Buick Regal. The aluminized steel body provides a practical balance of corrosion resistance and service life for everyday exhaust replacement, while the baffled internal design supports an OE-style exhaust note. AP Exhaust 700338 is a direct-fit option for drivers replacing a worn or damaged rear muffler on 1997-2004 Buick Regal models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Repair Uses

• Restoring a leaking or rusted rear muffler
• Replacing a noisy muffler with OE-comparable sound output
• Addressing exhaust restriction caused by internal muffler damage
• Repairing a damaged inlet or outlet connection on the Regal rear exhaust
• Returning the exhaust system to proper rear-section function

Installation Notes and Tips

Fits 1997-2004 Buick Regal, rear. The OE system was a welded assembly, and AP Exhaust notes that related parts identified in the application should be replaced as needed during service. Verify inlet and outlet orientation before installation: right lower inlet, center lower outlet, with 2.25 in. pipe connections.

Quality Assurance

AP Exhaust manufactures replacement exhaust components for service applications that require direct-fit geometry and OE-style sound characteristics. Part number 700338 is built to match the listed Regal rear muffler application and support a straightforward exhaust repair.