Yes. In most Chrysler 300 models, the exhaust system includes two catalytic converters—one for each bank of the engine—to meet emissions standards. This configuration is common across the typical engines used in the 300, though specific setups can vary by year and market.
Below is a detailed look at how the catalytic converter setup commonly appears on Chrysler 300 sedans, how engine choices influence the layout, and what to know if you’re inspecting or replacing components.
Typical catalytic converter layout on the Chrysler 300
Before outlining the common configurations, it helps to understand the general pattern you’ll encounter on most modern 300s.
- One catalytic converter per engine bank: For V-shaped engines, each bank (left and right) usually has its own cat, resulting in two total converters in the standard setup.
- Close-coupled and downstream placement: A converter is often mounted close to the manifold (close-coupled) for rapid heat, with a second converter placed further downstream in the exhaust flow to complete the emissions control sequence.
- Emissions and sensor placement: Each converter area typically has oxygen sensors before and after the units to monitor efficiency and regulate the engine’s air-fuel mixture.
These patterns reflect the common arrangement across the Pentastar V6 and Hemi V8 variants used in the 300 during recent years.
Engine options and how they affect the setup
The Chrysler 300 has been offered with several engines over its production life. While the exact exhaust routing can vary by year and market, the two-cat design is typical for the major gasoline powerplants used in the car.
3.6L Pentastar V6
The 3.6L Pentastar V6, a common engine in many 300 models, typically uses two catalytic converters—one for each bank of the V6. This arrangement is paired with a dual-exit exhaust layout in models that feature dual exhaust piping, and it is designed to meet modern emissions standards while supporting efficient exhaust flow.
5.7L Hemi V8
In versions equipped with the 5.7L Hemi V8, the exhaust system generally follows the same two-cat pattern—one catalytic converter per bank—coupled with a downstream cat arrangement. This setup helps manage higher flow and emissions performance associated with the larger engine.
6.4L Hemi (SRT/High-performance variants)
High-performance variants that use the 6.4L Hemi typically maintain two catalysts as well (one per bank), with the exhaust tuned for maximum performance while still meeting emissions requirements. The exact placement can vary with model year and exhaust configuration.
Note: Some older or region-specific trims could have differences due to local emissions regulations or retrofit requirements. Always verify against your vehicle’s VIN and service manual for the precise setup.
What to check if you’re inspecting or replacing catalytic converters
Knowing the general layout helps when diagnosing exhaust noises, check-engine codes, or planning replacement work.
- Identify the bank layout: Look for two catalysts in the exhaust path if your vehicle uses a V-shaped engine.
- Check heatshield and mounting points: Catalysts are often mounted close to the engine and along the mid-pipe; vibration or impact damage can affect them.
- Evaluate sensors: Expect pre- and post-cat oxygen sensors to monitor converter performance; faulty sensors can mimic cat problems.
When in doubt, consult the official service information for your exact model year and engine, or have a qualified tech inspect the exhaust system to confirm the number and location of catalytic converters.
Summary
Most Chrysler 300 models use two catalytic converters—one for each bank of the engine—to comply with emissions requirements. The exact arrangement (close-coupled versus downstream placement, and the presence of downstream cats) can vary by engine (3.6L Pentastar, 5.7L Hemi, 6.4L Hemi) and year, but the two-cat configuration is the norm for contemporary configurations. For precise details, check the vehicle’s VIN and the factory service manual.