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AP ExhaustPart #: 645288
AP Exhaust 645288 Catalytic Converter
⚙️ 51 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick, Cadillac, and Pontiac, Bonneville, DeVille, LeSabre, and Park Avenue
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AP Exhaust 645288 Catalytic Converter
| Brand | AP Exhaust |
| Part Number | 645288 |
| Body Material | Stainless steel |
| Inlet Gasket | Yes |
| Inlet Hardware | None |
| Inlet Type A | 4 bolt welded flange |
| O2 Sensor Ports | None |
| Outlet Gasket | Not required |
| Outlet Hardware | None |
| Outlet Type A | 2.57" od pipe |
| Overall Length (IN) | 20 |
| Substrate Material | Ceramic |
| Type | Federal / epa direct-fit |
This part fits 51 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Buick | LeSabre | 3.8L | V6 | N/A | Direct Fit; (Conv. Only); Cut as required.; 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.; Single Exhaust |
| 2005 | Buick | LeSabre | 3.8L | V6 | N/A | 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. |
| 2005 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 2005 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2005 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; (Use w/ Aftermarket Center Pipe); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; Cut as required.; Dual Exhaust, chrome tip applications |
| 2005 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2005 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; (Use With Aftermarket Components); Cut as required.; 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.; Single Exhaust |
| 2005 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2004 | Buick | LeSabre | 3.8L | V6 | N/A | Direct Fit; (Conv. Only); Cut as required.; 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.; Single Exhaust |
| 2004 | Buick | LeSabre | 3.8L | V6 | N/A | 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. |
| 2004 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 2004 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2004 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; (Use w/ Aftermarket Center Pipe); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; Cut as required.; Dual Exhaust, chrome tip applications |
| 2004 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2004 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; (Use With Aftermarket Components); Cut as required.; 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.; Single Exhaust |
| 2004 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2003 | Buick | LeSabre | 3.8L | V6 | N/A | Direct Fit; (Conv. Only); Cut as required.; 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.; Single Exhaust |
| 2003 | Buick | LeSabre | 3.8L | V6 | N/A | 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. |
| 2003 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 2003 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2003 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; (Use w/ Aftermarket Center Pipe); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; Cut as required.; Dual Exhaust, chrome tip applications |
| 2003 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2003 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; (Use With Aftermarket Components); Cut as required.; 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.; Single Exhaust |
| 2003 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2002 | Buick | LeSabre | 3.8L | V6 | N/A | Direct Fit; (Conv. Only); Cut as required.; 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.; Single Exhaust |
| 2002 | Buick | LeSabre | 3.8L | V6 | N/A | 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. |
| 2002 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 2002 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2002 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; (Use w/ Aftermarket Center Pipe); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; Cut as required.; Dual Exhaust, chrome tip applications |
| 2002 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2002 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; (Use With Aftermarket Components); Cut as required.; 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.; Single Exhaust |
| 2002 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2001 | Buick | LeSabre | 3.8L | V6 | N/A | Direct Fit; (Conv. Only); Cut as required.; 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.; Single Exhaust |
| 2001 | Buick | LeSabre | 3.8L | V6 | N/A | 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. |
| 2001 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 2001 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2001 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; (Use w/ Aftermarket Center Pipe); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; Cut as required.; Dual Exhaust, chrome tip applications |
| 2001 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2001 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; (Use With Aftermarket Components); Cut as required.; 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.; Single Exhaust |
| 2001 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2000 | Buick | LeSabre | 3.8L | V6 | N/A | Direct Fit; (Conv. Only); Cut as required.; 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.; Single Exhaust |
| 2000 | Buick | LeSabre | 3.8L | V6 | N/A | 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. |
| 2000 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 2000 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2000 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; (Use w/ Aftermarket Center Pipe); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; Cut as required.; Dual Exhaust, chrome tip applications |
| 2000 | Cadillac | DeVille | 4.6L | V8 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 2000 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; (Use With Aftermarket Components); Cut as required.; 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.; Single Exhaust |
| 2000 | Pontiac | Bonneville | 3.8L | V6 | N/A | Direct Fit; For use with Aftermarket pipes, additional sizing, bushings, cutting may be required due to OE exhaust design.; 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. |
| 1999 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 1998 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
| 1997 | Buick | Park Avenue | 3.8L | V6 | N/A | Direct Fit; (00-05); 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.; Cut as required. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.