Two catalytic converters.
The 2011 Honda Pilot uses a two-cat exhaust arrangement for its 3.5-liter V6 engine, with one catalytic converter on each bank of the engine. This setup reduces emissions more efficiently and aligns with emissions requirements. In most vehicles of this era, this is the standard configuration; however, variations can occur by market or aftermarket changes, so for exact specification you should verify with the VIN or service manual.
Where the converters sit and how they work
To help visualize the setup, here's a concise guide to the standard two-cat arrangement on this model:
- Close-coupled catalytic converter (front bank): Mounted near the engine, one converter per bank, it begins the emissions reduction early in the exhaust flow.
- Downstream catalytic converter (main): Located further along the exhaust path, provides additional emissions treatment before the gases exit the vehicle.
Notes for owners: If you are diagnosing exhaust issues or planning replacements, you will likely encounter both converters in service; most maintenance sections treat them as a pair due to shared impact on emissions and backpressure.
Summary
The standard configuration for a 2011 Honda Pilot is two catalytic converters—one on each bank of the V6 engine. Always confirm with your vehicle's VIN or service manual for your specific build, but two is the typical count for this model year.