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AP Exhaust 700319 Exhaust Muffler - Front
| Brand | AP Exhaust 700319 |
|---|---|
| Position | Front |
| Body Diameter | 5 |
| Body Length | 17.75 |
| Body Material | Aluminized Steel |
| Grade Type | Regular |
| Heat Shield Attached | No |
| Inlet Inside Diameter | 2.59 |
| Inlet Location | Center |
| Inlet Type | Pipe |
| Muffler Configuration | C/CR |
| Muffler Type | Baffled |
| Outlet Inside Diameter | 2.25 |
| Outlet Location | Center |
| Outlet Type | Pipe |
| Overall Length | 28 |
| Series | MSL |
| Shape | Round |
| Sound Level | OE comparable |
| Tunable | No |
| Fits | Buick and Pontiac · 14 vehicles |
OE comparable sound. Delivers a familiar exhaust note for a balanced driving experience.
Baffled design. Helps shape exhaust flow for consistent muffler performance.
Aluminized steel body. Resists corrosion better than plain steel for longer service life.
AP Exhaust 700319 Muffler for Buick and Pontiac
AP Exhaust 700319 is a direct-fit exhaust muffler for select Buick LeSabre, Buick Park Avenue, and Pontiac Bonneville applications. It uses a baffled, round aluminized steel body with center inlet and center outlet pipe connections for OE-style exhaust service.
Key Features
- Part number: 700319
- AP Exhaust MSL series muffler
- Round muffler body with 5-inch body diameter
- 17.75-inch body length and 28-inch overall length
- Aluminized steel construction
- Baffled muffler design with OE comparable sound level
- Center inlet, center outlet pipe configuration
- Direct-fit replacement for select front exhaust applications
Product Details
This AP Exhaust muffler is built for front exhaust replacement on 2000-2005 Buick LeSabre, 2004-2005 Buick Park Avenue, and 2000-2005 Pontiac Bonneville models listed in the fitment data. The 700319 uses a 2.59-inch inlet and 2.25-inch outlet with a center-in/center-out layout, making it a practical choice for restoring factory-style exhaust routing on single-exhaust vehicles. The baffled internal design and OE comparable sound level support a quieter, original-equipment-type exhaust note without changing the vehicle’s basic exhaust configuration.
AP Exhaust 700319 is a strong match for shoppers searching for a direct fit muffler for 2003-2005 Buick LeSabre front exhaust, 2004-2005 Buick Park Avenue front muffler replacement, or 2003-2005 Pontiac Bonneville front exhaust service. This part number, 700319, is also relevant for 2000-2002 Buick LeSabre and Pontiac Bonneville applications where the OE system was welded and the extension pipe must be cut during installation.
Common Problems This Muffler Can Address
- Rust or corrosion in the original muffler body
- Exhaust noise from a leaking or damaged muffler
- Factory muffler replacement after welded-system service
- Restricted exhaust flow caused by internal muffler deterioration
- Need to restore OE-style exhaust routing on single-exhaust vehicles
Installation Notes and Tips
- Fits front exhaust positions only for the listed vehicles.
- Some applications require cutting the OE extension pipe for installation.
- Several listed OE systems were welded assemblies, so related exhaust parts may need replacement during service.
- Verify inlet and outlet sizing before installation: 2.59-inch inlet and 2.25-inch outlet.
- Confirm vehicle year, make, model, and exhaust configuration before ordering.
Quality Assurance
AP Exhaust manufactures this muffler as a regular-grade replacement part in the MSL series for OE-style exhaust service. The aluminized steel body and baffled construction are specified for standard replacement use on the listed Buick and Pontiac applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Buick | LeSabre | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (03-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation.; Single Exhaust |
| 2005 | Buick | Park Avenue | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (04-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation. |
| 2005 | Pontiac | Bonneville | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (03-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation.; Single Exhaust |
| 2004 | Buick | LeSabre | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (03-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation.; Single Exhaust |
| 2004 | Buick | Park Avenue | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (04-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation. |
| 2004 | Pontiac | Bonneville | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (03-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation.; Single Exhaust |
| 2003 | Buick | LeSabre | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (03-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation.; Single Exhaust |
| 2003 | Pontiac | Bonneville | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (03-05); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Cut O.E. extension pipe as necessary for installation.; Single Exhaust |
| 2002 | Buick | LeSabre | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (01-02); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; The O.E. extension pipe must be cut off 9" behind the pipe to converter weld.; Single Exhaust |
| 2002 | Pontiac | Bonneville | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (01-02); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; The O.E. extension pipe must be cut off 9" behind the pipe to converter weld.; Single Exhaust |
| 2001 | Buick | LeSabre | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (01-02); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; The O.E. extension pipe must be cut off 9" behind the pipe to converter weld.; Single Exhaust |
| 2001 | Pontiac | Bonneville | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (01-02); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; The O.E. extension pipe must be cut off 9" behind the pipe to converter weld.; Single Exhaust |
| 2000 | Buick | LeSabre | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (2000); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; The O.E. extension pipe must be cut off 4" behind the pipe to converter weld.; Single Exhaust |
| 2000 | Pontiac | Bonneville | 3.8L | V6 | Front | DIRECT FIT MSL/MAXIMUM Muffler; (2000); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; The O.E. extension pipe must be cut off 4" behind the pipe to converter weld.; Single Exhaust |
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