What cars have 2 catalytic converters?
Most cars with dual exhausts have two catalytic converters—one on each exhaust bank—typical of V6 and V8 engines. This arrangement helps meet emissions standards more efficiently across driving conditions.
This article explains how two catalytic converters are arranged, which kinds of vehicles typically use them, and how you can verify the setup on a specific vehicle.
How two catalytic converters are arranged and why
In most dual-catalyst systems, a converter sits on each exhaust bank. A front "pre-cat" or close-to-engine converter often lights off quickly to begin reducing emissions, while a downstream main catalyst handles the majority of the conversion as exhaust flows toward the muffler. Some engines also employ two cats on a single bank for tighter emissions control. The result is lower pollutants without sacrificing performance, while meeting different market regulations.
Typical vehicle categories that use two catalytic converters
The following vehicle categories commonly use two catalytic converters, but exact configurations vary by model year and market. When in doubt, check the vehicle’s repair guides or parts diagrams.
- Vehicles with V6 or V8 engines and dual exhaust systems — commonly one catalyst per bank.
- Full-size trucks and SUVs designed for higher emissions control and durability.
- High-performance or sport trims where rapid catalyst light-off improves emissions handling at various RPMs.
- Some hybrid configurations that integrate multiple catalysts to manage cold-start emissions.
Note that not every vehicle in these categories has exactly two catalytic converters; some may have more (especially four-converter setups on certain engines) or fewer, depending on the design and region.
How to verify for your vehicle
To confirm the exact number and placement of catalytic converters on your car, consult the factory service manual or a reputable parts diagram for your model and year. Inspect the exhaust path under the vehicle: a typical two-cat setup has a converter near the engine (on one or both banks) and another downstream toward the exhaust tail, or multiple units along the path in more complex configurations. A dealer or qualified mechanic can also verify quickly by VIN and engine code.
Summary: Many dual-exhaust cars with V engines use two catalytic converters—one per bank—though exact configurations vary by engine and market. Always verify with model-specific documentation when planning maintenance or replacements.
