AP Exhaust 700339 Exhaust Muffler

AP Exhaust 700339 Muffler for OE-Style Replacement

AP Exhaust 700339 is a direct-fit exhaust muffler built for select GM minivans that need an OE-comparable sound level and a factory-style exhaust layout. This aluminized steel muffler uses an oval baffled design with a 2.25-inch inlet and 2.25-inch outlet to match the original system configuration on covered applications.

Key Features

• Part number: 700339
• AP Exhaust MSL series muffler
• Oval baffled muffler design
• Aluminized steel body for everyday corrosion resistance
• 2.25-inch inlet and 2.25-inch outlet
• Right-center inlet and center outlet layout
• OE comparable sound level
• Direct-fit replacement for select welded OE systems

Product Details

AP Exhaust 700339 is engineered as a replacement muffler for vehicles originally equipped with a welded exhaust assembly. The 28-inch body length, 32-inch overall length, and oval 7 x 9-inch body dimensions support a factory-style fit on the listed applications. This muffler is part of the MSL series and uses a baffled internal design to maintain an OE-like exhaust tone without adding tunability. For shoppers searching for an AP Exhaust 700339 muffler for Oldsmobile Silhouette or Pontiac Montana exhaust replacement, this part matches the specified inlet and outlet sizing and layout.

Compatible With 1997-2001 Oldsmobile Silhouette, N/A; 1999-2001 Pontiac Montana, N/A; and 1997-1998 Pontiac Trans Sport, N/A. This part cross-references common OE-style replacement needs for the same application.

Common Issues This Muffler Can Address

• Rust-through or perforation in the original muffler body
• Exhaust noise caused by a failing internal baffle
• Factory welded muffler replacement on covered GM minivans
• Loss of OE-like exhaust tone after corrosion or damage
• Fitment problems from using a non-matching inlet and outlet layout

Installation Notes and Tips

Verify the vehicle’s door decal code and exhaust configuration before ordering, especially on 1997-2001 Oldsmobile Silhouette, 1999-2001 Pontiac Montana, and 1997-1998 Pontiac Trans Sport models. The OE system on these applications was a welded assembly, so related exhaust parts noted in the vehicle notes should be inspected and replaced as needed during service. Confirm the 2.25-inch pipe connections and right-center inlet / center outlet orientation before installation.

Quality Assurance

AP Exhaust manufactures this muffler as a regular-grade aluminized steel replacement for direct-fit service on the listed vehicles. The MSL series is built to restore factory-style exhaust function and OE-comparable sound on the specified applications.