Bosal 280-663 Exhaust Muffler Assembly - Rear Left

Direct-Fit Muffler Assembly for Audi A4 Quattro

Bosal BRExhaust Direct-Fit Exhaust Muffler Assembly 280-663 is built for a factory-like exhaust note and OE-style performance. It is a direct-fit rear left muffler assembly for select Audi A4 Quattro models, with a bolt-on layout that avoids modification during replacement.

Compatible with 2005-2008 Audi A4 Quattro, rear left, this aluminized steel muffler assembly is made with 16-gauge steel tubing and a fully aluminized finish for added corrosion protection. The oval muffler body and sleeved inlet support a clean replacement for the rear silencer on the left side.

Key Features

• Direct-fit exhaust muffler assembly for OE-style replacement
• Fits 2005-2008 Audi A4 Quattro, rear left
• Aluminized steel construction with aluminized finish
• 16-gauge steel tubing for durable exhaust service
• Oval muffler body with factory-like sound control
• Sleeved inlet and tip-style outlet for direct replacement
• Low backpressure design to support exhaust flow

Product Details

The Bosal BRExhaust line focuses on direct-fit exhaust components that match original equipment-style packaging and sound characteristics. Part number 280-663 is a premium muffler assembly for the rear left position on Audi A4 Quattro applications, including 2005 models from 1/1/2005 onward and 2006-2008 vehicles. The aluminized steel muffler box is engineered for quiet operation while helping resist corrosion in everyday driving conditions.

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

Common Replacement Reasons

• Rust or corrosion in the rear muffler assembly
• Excess exhaust noise from a worn silencer
• Restricted exhaust flow from internal deterioration
• Need for a direct replacement on the rear left side
• Factory exhaust tone no longer maintained

Installation Notes

Fits 2005-2008 Audi A4 Quattro, rear left. The direct-fit configuration is intended for bolt-on installation without modifications. Verify inlet diameter, outlet style, and rear-left placement against the original exhaust component before installation. Professional installation is recommended for proper alignment and sealing.

Quality Assurance

Built by a leading OE supplier, this BRExhaust muffler assembly is constructed to deliver OE-style fit and sound characteristics with aluminized corrosion protection.