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AP Exhaust 641564 Catalytic Converter - Front Left
| Brand | AP Exhaust 641564 |
|---|---|
| Position | Front Left |
| Inlet Gasket Qty | 1 |
| Inlet Hardware | None |
| Inlet Type A | 3 bolt welded |
| O2 Sensor Ports | 1 |
| Outlet Gasket Qty | 1 |
| Outlet Hardware | Yes |
| Outlet Type A | 2 bolt welded |
| Overall Length (IN) | 13 |
| Substrate Material | Ceramic |
| Type | Federal / epa direct-fit |
| Fits | Buick · 4 vehicles |
Direct-fit replacement. Built to exact OE dimensions for straightforward installation.
Ceramic substrate. Proprietary chemistry delivers efficient converter performance.
Catalytic converter. Federal / EPA compliant design for emissions control.
Cross-references 25798276 for the same application. See all 1.
OE-Fit Catalytic Converter for LaCrosse
AP Exhaust 641564 is a Federal / EPA direct-fit catalytic converter built for exact OE dimensions and fitment. It is engineered for the 2010-2011 Buick LaCrosse, front left, with ceramic substrate construction and one O2 sensor port for a direct replacement on the listed application.
Key Features
- Federal / EPA direct-fit catalytic converter
- Ceramic substrate material
- Built to OE dimensions for proper fitment
- 3-bolt welded inlet and 2-bolt welded outlet
- One O2 sensor port
- Overall length: 13 inches
- Outlet hardware included; inlet hardware not included
Product Details
AP Exhaust 641564 uses ARISTO substrate chemistry and modern manufacturing methods to support efficient converter loading and consistent production quality. For buyers searching for a 2010-2011 Buick LaCrosse front left catalytic converter, this direct-fit unit is built to match the listed OE-style dimensions and connection points for straightforward replacement on the specified emissions application. This part cross-references 25798276 for the same application.
Common Issues This Part Can Address
- Failed emissions test due to a worn or inefficient catalytic converter
- Check engine light related to catalyst efficiency codes
- Restricted exhaust flow from a deteriorated converter substrate
- Exhaust leaks at the converter connection points
- Fitment problems when replacing the original front left converter on a Buick LaCrosse
Installation Notes
Fits 2010-2011 Buick LaCrosse, front left. Verify the vehicle’s emissions configuration before installation, since this part is listed for Federal and California emissions applications but is not for sale or use on vehicles licensed in CA, CO, ME, or NY. Confirm the inlet and outlet flange style, O2 sensor port location, and overall length before installation to ensure the replacement matches the original exhaust layout. Professional installation is recommended for proper sealing and emissions compliance.
Quality Assurance
AP Exhaust states that its manufacturing process uses automated workstations, spinner welding equipment, and high-speed production lines to help maintain OE dimensions and consistent fitment. The converter is built as a Federal / EPA direct-fit replacement for the listed Buick LaCrosse application.
| Year | Make | Model | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2011 | Buick | LaCrosse | FWD | 3.6L | V6 | Front Left | Direct Fit; (10-11); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details. |
| 2011 | Buick | LaCrosse | — | 3.6L | V6 | Front Left | Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details. |
| 2010 | Buick | LaCrosse | FWD | 3.6L | V6 | Front Left | Direct Fit; (10-11); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details. |
| 2010 | Buick | LaCrosse | — | 3.6L | V6 | Front Left | Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details. |
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