AP Exhaust 700300 Exhaust Muffler - Left or Rear Left

AP Exhaust 700300 Muffler Overview

The AP Exhaust 700300 is a direct-fit exhaust muffler for select GM W-body applications with dual exhaust. Built from aluminized steel with an oval baffled design, it uses a 1.88-inch inlet and 2.25-inch outlet to match the specified rear-left or left-side position on supported vehicles.

For shoppers searching for a Buick LaCrosse muffler, Pontiac Grand Prix muffler, or Chevrolet Monte Carlo rear left exhaust replacement, this AP Exhaust 700300 offers an OE-comparable sound level and a regular-grade construction for factory-style service replacement.

Key Features

• Part number: 700300
• AP Exhaust MSL series muffler
• Oval baffled muffler configuration
• Aluminized steel body for exhaust system service replacement
• 1.88-inch inlet inside diameter, left lower inlet location
• 2.25-inch outlet inside diameter, center lower outlet location
• OE comparable sound level
• Direct-fit application for select rear-left and left-side dual exhaust vehicles

Detailed Description

The AP Exhaust 700300 muffler is engineered for direct replacement on specific Buick, Pontiac, and Chevrolet dual-exhaust applications. Its oval body measures 7 inches high, 9 inches wide, and 14 inches long, with an 18-inch overall length, giving it the dimensions needed for the listed rear-left and left-side installations. The baffled internal design supports factory-style exhaust tone, while the aluminized steel construction is suited to standard exhaust repair and replacement work.

Compatible With 2005-2008 Buick LaCrosse, rear left; 2003-2008 Pontiac Grand Prix, rear left; 2005-2007 Buick Allure, rear left; 2003-2005 Chevrolet Monte Carlo, rear left; 2000-2002 Chevrolet Monte Carlo, rear left; and 1997-2002 Pontiac Grand Prix, left. This part number, 700300, is a practical choice when replacing a worn or damaged rear muffler on these applications.

Common Replacement Uses

• Restoring exhaust flow after muffler corrosion or internal failure
• Replacing a noisy muffler with an OE-comparable sound level unit
• Repairing exhaust leaks at the rear-left muffler location
• Replacing a damaged muffler on dual-exhaust Buick, Pontiac, or Chevrolet models
• Addressing fitment issues on factory-style rear exhaust service jobs

Installation Notes

Verify inlet and outlet orientation before installation: left lower inlet, center lower outlet. Confirm the vehicle uses the listed dual-exhaust configuration and rear-left or left-side muffler position before ordering. The muffler is not tunable and does not include a heat shield attached. Professional exhaust installation is recommended to ensure proper alignment and sealing.

Quality Assurance

AP Exhaust manufactures this muffler as a regular-grade replacement part in the MSL series, using aluminized steel for standard exhaust service applications. The 700300 is built to match the listed direct-fit vehicle applications and OE-comparable sound requirements.