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If you want a more engaging exhaust tone and improved flow on your Chrysler 300, choosing the right cat-back exhaust system matters. The correct system affects sound, throttle response, and how the car performs at different engine speeds. This guide highlights six shortlisted cat-back options tailored to the Chrysler 300 and explains the core attributes that make them stand out. We evaluated each pick on fitment, build quality, and acoustic character to help you narrow down the choices. Read on for a concise breakdown of what to expect from each type of system and the criteria used to create this list.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Flowmaster Outlaw Cat-back Exhaust System for 2005–2010 Chrysler 300C 5.7L Hemi |  |
| Best Quality Built to a higher standard if you want something more solid | CORSA 14440 Cat-Back Exhaust System |  |
| Best Budget The cheapest option that still gets the job done reliably | Invidia Q300 Cat-Back Exhaust System for Lexus GS 300/350 |  |
| Most Sold A high-volume bestseller chosen again and again | CORSA 14535 Cat-Back Exhaust System |  |
| Best Value for Money The sweet spot between price and what you get | Flowmaster American Thunder Cat-Back Exhaust System (817737) |  |
| Best Overall The best all-around choice for most situations | Borla 140686 Cat-Back Performance Exhaust System for 2015-2023 Chrysler 300 V6 |  |
1. Flowmaster Outlaw Cat-back Exhaust System for 2005–2010 Chrysler 300C 5.7L Hemi
| Vehicle Service Type | Car |
|---|---|
| Configuration | RWD |
| Inlet Connection Size | 2.5 Inches |
| Automotive Fit Type | Vehicle Specific Fit |
This Flowmaster Outlaw cat-back replaces the factory rear exhaust from the catalytic converters back and is designed specifically for 2005–2010 Chrysler 300C, Charger R/T and Magnum R/T vehicles with the 5.7L Hemi V8. It uses dual 2.5-inch mandrel-bent stainless tubing into a Scavenger X-pipe, race-inspired Outlaw mufflers and mandrel-bent tailpipes to amplify mid- and high-RPM sound while keeping cabin cruising noise moderate. Large 4.00-inch black ceramic-coated tips give a finished look and the kit is intended to use factory hanger locations for a direct fit; Flowmaster supplies the necessary hardware and instructions for bolt-on installation. In practice the system gives a pronounced raspy under-load tone that improves throttle response feel and exhaust flow, while the X-pipe helps balance backpressure for performance. Expect solid fitment when parts are checked at delivery, but inspect flex sections and unpack parts carefully because occasional packaging errors or damaged flex pieces have been reported. Professional installation is recommended to ensure hangers and clamps seat correctly.
Best for: Reliability-focused owners who prioritize a factory-quality, vehicle-specific exhaust that improves sound and exhaust flow without aggressive cabin drone during daily driving.
Less Ideal for: Drivers seeking a near-silent or fully mellow touring exhaust or those who want an adjustable or valved system for variable sound levels should consider other options.
- Vehicle-specific design for 2005–2010 Chrysler 300C 5.7L Hemi for a bolt-on installation
- Mandrel-bent stainless tubing and Scavenger X-pipe for improved flow and a balanced tone
- Race-inspired Outlaw mufflers deliver an aggressive under-load sound with restrained cruising noise
- Includes hardware and uses factory hanger locations to simplify installation
- Some buyers report packaging mistakes or incorrect tailpipe pieces requiring modification or return
- Flex sections have been reported to break on rare units and should be inspected on receipt
Verdict A direct-fit, performance-oriented cat-back for Chrysler 300C drivers who want a louder, racier exhaust tone with solid fitment when inspected carefully.
2. CORSA 14440 Cat-Back Exhaust System
| Model | JEGS |
|---|---|
| Global Trade Identification Number | 00847466006005 |
| Manufacturer Part Number | 14440 |
The CORSA 14440 cat-back system is a full stainless steel replacement exhaust engineered to give a stronger exhaust note under acceleration while minimizing cabin drone at cruising speeds. Designed for Chrysler 300 applications, it installs in place of the factory rear section and is typically used to improve throttle response, sound character, and exhaust flow without changing headers or cats. CORSA highlights its patented Reflective Sound Cancellation technology, which shapes the tone so you get an aggressive, sporty sound when you push the engine and a quiet, drone-free experience on the highway. The system includes precision laser-engraved tips and a dual-walled design intended to resist heat distortion while looking factory-quality. Expect tangible driving feel improvements when paired with proper tuning, and a robust stainless construction that resists corrosion. Limitations are typical for bolt-on cat-backs: you will need correct fitment for your Chrysler 300 trim and some installations benefit from a lift or professional alignment to avoid hang-ups under lowered cars.
Best for: Performance-oriented Chrysler 300 owners who prioritize a louder, more aggressive exhaust character without intrusive highway drone and who value a high-quality, durable factory-style replacement.
Less Ideal for: Owners seeking the absolute loudest or track-focused system with maximum flow gains or those who prefer a simple muffler swap rather than a full cat-back replacement.
- Reflective Sound Cancellation tech produces aggressive acceleration sound with minimal cruise drone
- Full stainless steel construction for corrosion resistance and long service life
- Dual-walled, clamp-on tip design resists heat distortion and provides a factory-quality appearance
- Designed as a direct cat-back replacement for Chrysler 300 for straightforward installation
- Requires correct trim-specific fitment and may need professional installation for best alignment
- Performance gains depend on complementary modifications or tuning and are not automatic
Verdict A high-quality, factory-style cat-back for Chrysler 300 that balances an aggressive under-load sound with a quiet, drone-free cruise thanks to CORSA's acoustic design.
3. Invidia Q300 Cat-Back Exhaust System for Lexus GS 300/350
| Piping diameter | 70 millimeter |
|---|---|
| Tip size | 110 millimeter |
| Material | SUS304 polished stainless steel |
This Invidia Q300 cat-back replaces the stock exhaust from the catalytic converter back and is built to increase flow and add a deeper, sporty exhaust note without becoming excessively loud. It uses 70 mm mandrel-bent piping made from polished SUS304 stainless steel, continuous internal piping and Advantex packing inside the muffler to optimize back pressure for gains in horsepower and torque. Fabrication features like CNC flanges, robot TIG welding and double-wall polished tips aim to deliver factory-quality fit and long-term corrosion resistance. In practice the system should give a noticeable low-end rumble and improved high-speed aerodynamics from the flat-bottom muffler shape while remaining suitable for daily driving. Limitations are that this is a vehicle-specific cat-back originally listed for Lexus GS models so compatibility with the Chrysler 300 requires confirming flange and hanger alignment or using adapters and professional installation, and the sound profile may not satisfy buyers seeking a very quiet or very aggressive tone.
Best for: Budget-conscious buyers who prioritize stronger performance tone and improved flow over a direct factory-silent sound and are willing to arrange professional fitment or minor modifications.
Less Ideal for: Drivers seeking a guaranteed bolt-on, vehicle-specific exhaust for the Chrysler 300 or those who want a very quiet, near-stock sound without aftermarket resonance.
- Mandrel-bent 70 mm stainless piping for improved exhaust flow and durability
- Continuous internal piping and Advantex packing to optimize back pressure and produce a deeper sporty tone
- CNC flanges and robot TIG welding for consistent fitment and long-term reliability
- Polished double-wall stainless or titanium tips for a finished appearance
- Originally produced for Lexus GS models so direct bolt-on fit for Chrysler 300 is not guaranteed
- Requires professional fitment verification or modifications to ensure correct hanger and flange alignment
Verdict A cost-focused performance cat-back that delivers a deeper sporty sound and improved flow but requires fitment confirmation for Chrysler 300 use.
4. CORSA 14535 Cat-Back Exhaust System
| Manufacturer | Corsa Performance |
|---|---|
| Brand | Corsa |
| Item model number | 14535 |
| OEM Part Number | 14535 |
The CORSA 14535 cat-back is a complete exhaust replacement designed to give a Chrysler 300 a louder, performance-oriented note on acceleration while keeping cruising comfortable. It uses CORSA's patented Reflective Sound Cancellation (RSC) to tune the tone so you get aggressive sound under load but minimal drone at highway speeds. Built from premium stainless steel with dual-walled, clamp-on tips and precision laser-engraved logo, the system resists heat distortion and installs as a direct-fit factory-quality replacement for compatible Chrysler 300 applications. In practical use you can expect a noticeable change in exhaust character without intrusive cabin resonance, and no loss of the performance gains regardless of the sound setting. Limitations are that this is a vehicle-specific cat-back so fitment must exactly match Chrysler 300 model year and drivetrain, and installation may require an alignment or hanger adjustments on older cars.
Best for: Practical, risk-averse Chrysler 300 owners who want a factory-quality replacement that improves sound and durability without introducing annoying cabin drone.
Less Ideal for: Buyers who need a universal or multi-vehicle exhaust solution or who plan extensive custom tuning beyond a direct-fit cat-back should consider other options.
- Reflective Sound Cancellation reduces cabin drone while allowing a pronounced acceleration tone.
- Premium stainless steel construction resists heat distortion and corrosion.
- Direct-fit cat-back designed for bolt-on installation on compatible Chrysler 300s.
- Clamp-on tip design simplifies final alignment and appearance adjustments.
- Fitment is specific to Chrysler 300 variants so the correct year and drivetrain selection is essential.
- Does not include installation hardware or detailed vehicle-specific instructions in the listing.
Verdict A factory-quality cat-back for Chrysler 300s that delivers aggressive acceleration sound with engineered drone cancellation, provided you confirm exact fitment.
5. Flowmaster American Thunder Cat-Back Exhaust System (817737)
| Installation Type | Bolt-On |
|---|---|
| Compatible with Vehicle Type | Car |
| Manufacturer Part Number | 817737 |
The Flowmaster American Thunder cat-back replaces the factory rear exhaust on a Chrysler 300 V6 to produce a fuller, throatier tone without extreme volume. It is a bolt-on system that uses factory hanger locations and band clamps for a straightforward install that many owners complete in an hour with basic hand tools or at a modest-cost shop. The kit features mandrel-bent piping, scavenger X-pipe crossover and tuned resonators to shape tone and scavenging for improved flow and responsiveness at part-throttle. In practice that translates to a noticeably meatier idle and stronger-sounding throttle blips while remaining tolerable inside the cabin for daily driving. Some drivers report highway drone at specific RPMs, so long-distance cruising comfort can vary by vehicle and driving speed. Build quality and fitment are generally good and it accepts factory trim or aftermarket tips, but it will not mimic a V8 and gains in noise and character come at the expense of possible drone on some chassis setups.
Best for: Practical optimizers who want a cost-effective, factory-friendly exhaust upgrade for their Chrysler 300 V6 that improves sound and daily driving character without radical modification.
Less Ideal for: Drivers seeking maximum power gains or a loud, V8-like soundtrack should consider higher-end performance systems or different configurations instead.
- Designed for bolt-on installation using factory hanger locations for easier fitment on Chrysler 300 V6 models
- Scavenger X-pipe and tuned resonators deliver a deeper, muscle-car tone without extreme exterior volume
- Mandrel-bent tubing and band clamps promote smooth exhaust flow and straightforward assembly
- Includes hardware sized to work with factory mounting points so aftermarket tips can be added
- Some users report pronounced drone at specific highway RPMs which can affect long-distance comfort
- Not intended to replicate the sound or power delivery of a V8; gains are in sound and throttle response rather than large horsepower increases
Verdict A budget-conscious, bolt-on cat-back that gives Chrysler 300 V6 cars a fuller, factory-friendly sound but may produce highway drone for some drivers.
6. Borla 140686 Cat-Back Performance Exhaust System for 2015-2023 Chrysler 300 V6
| Vehicle fitment | 2015–2023 Chrysler 300 V6 |
|---|---|
| Material | T-304 stainless steel |
| Exit style | Dual split rear exit |
| Installation | Bolt-on, reuses factory tips |
This Borla cat-back replaces the stock mid- and rear-exhaust sections on the 2015–2023 Chrysler 300 V6 to deliver a deeper, more aggressive exhaust note and freer exhaust flow. It is a fully welded T-304 stainless steel system designed for bolt-on installation using factory hangers and the existing tips can be reused. In daily use it gives a noticeable low-end rumble at idle and a stronger tone under acceleration without adding drone according to the product description and owner reports. The construction and stainless material mean good corrosion resistance and long life, and Borla’s focus on sound tuning aims to balance throatiness with drivability. On the downside the system is relatively loud compared with quiet factory systems and some owners report it takes break-in miles to reach the final tone; it also requires proper fitment to the Chrysler 300 V6 and professional installation if you want perfect alignment. Expect an exhaust that emphasizes character and longevity rather than subtlety or strict stealth.
Best for: Buyers seeking a balanced, all-round upgrade for their Chrysler 300 V6 who want improved sound character and durable materials without chasing extreme horsepower parts.
Less Ideal for: Drivers who prioritize a factory-quiet cabin or require a mild, stealthy exhaust should consider quieter muffler options or different tuning approaches.
- T-304 stainless steel construction for corrosion resistance and long service life
- Bolt-on design that uses factory hangers for straightforward installation
- All-welded construction reduces leak points and improves durability
- Delivers a deeper idle rumble and stronger acceleration tone compared with stock
- Higher overall volume than stock which may not suit drivers seeking a subtle upgrade
- Sound character can change after break-in miles and may be louder than expected initially
Verdict A durable, bolt-on stainless cat-back that gives the Chrysler 300 V6 a fuller, sportier tone while focusing on longevity and everyday drivability.
Choosing the Right Chrysler 300 Cat-back Exhaust System: Key Factors to Consider
Fitment and Mounting
Correct fitment is fundamental because a cat-back system must align with the Chrysler 300s factory hangers and flanges to avoid stress on joints and vibration issues. Poor alignment can cause premature wear on hangers and create leaks at flanges, leading to rattles or exhaust smell in the cabin.
Check whether the system uses OEM-style hangers and includes gaskets or bolts for a direct swap. Systems that claim model-specific fitment typically reduce installation time and the need for cutting or bending, which matters for longevity and noise control.
Material and Corrosion Resistance
Exhaust materials determine how long the system will resist rust and deterioration from road salt and heat cycling. Stainless steel alloys offer improved corrosion resistance compared with mild steel, while mandrel-bent tubing tends to retain shape and flow characteristics longer.
Look for specifications about alloy grade, wall thickness, and coating. These aspects influence long-term appearance and structural integrity, which affects both performance consistency and resale value of the vehicle.
Pipe Diameter and Flow Characteristics
Tube diameter and routing shape how exhaust gases move and how much backpressure the engine experiences. Increasing diameter can reduce restriction and improve high-end power, but oversizing may reduce low-end torque and throttle response on a street-driven Chrysler 300.
Consider systems with balanced diameter choices and smooth, mandrel bends to preserve exhaust velocity. The correct sizing will depend on your driving priorities, whether you favor stronger midrange response or maximum top-end breathing.
Muffler Design and Sound Profile
Muffler architecture determines the tone, volume, and harmonic content of the exhaust. Chambered mufflers tend to produce deeper tones with pronounced resonance, while straight-through designs yield louder, more aggressive character with fewer low-frequency notes.
Think about when and where you drive most often. A system that sounds great on an open road may be intrusive in urban settings. Many systems offer multiple muffler options or inserts to tailor sound without altering fitment.
Compatibility With Sensors and Emissions Hardware
Modern exhausts must accommodate oxygen sensors and emissions-related hardware to maintain drivability and avoid check-engine issues. A cat-back designed for the Chrysler 300 should provide correct bung locations and sufficient clearance for sensor wires and plugs.
Avoid systems that relocate sensors excessively or require custom extensions. Maintaining proper sensor positioning helps the engine control unit read accurately and keeps the vehicle operating smoothly.
Installation Complexity and Required Tools
Installation ease affects cost and time. A true bolt-on cat-back that uses factory mounting points and comes with hardware reduces the need for professional labor. Conversely, systems that require cutting, welding, or aftermarket adapters increase complexity and risk of leaks.
Factor in whether you will install the system yourself or seek professional help. Systems that include clear hardware, instructions, and designed-to-fit components typically result in fewer alignment adjustments and a cleaner final fit.
FAQ
Will a cat-back exhaust system change my Chrysler 300's fuel economy?
A cat-back can affect fuel economy slightly depending on the system's flow characteristics. Reduced backpressure can improve efficiency at higher RPMs, but changes are usually modest. Driving habits and engine tuning have a larger impact than most bolt-on exhaust swaps.
Can I install a cat-back system on a Chrysler 300 myself?
Many cat-back systems are designed for bolt-on installation and can be fitted at home with basic hand tools and a lift or jack stands. However, some kits require anti-seize, torque specs, or minor adjustments. If you are uncomfortable with exhaust hardware or working under the car, professional installation is a reliable option.
How loud will a cat-back make the Chrysler 300?
Loudness varies with muffler design, pipe diameter, and routing. Straight-through systems tend to be louder and more aggressive, while chambered mufflers produce a deeper, milder tone. Expect sound levels to change between idle, cruising, and full throttle.
Do I need to re-tune the engine after installing a cat-back?
Most cat-back installations do not require tuning because they do not alter engine fueling or intake air. In some cases where flow is significantly increased, a minor ECU adjustment can optimize performance. Tuning is more common when combined with intake changes or header swaps.
What maintenance does a cat-back exhaust need?
Regular visual inspections for leaks, loose hangers, and surface corrosion will extend service life. Tighten clamps and fasteners as needed and replace gaskets or hangers that show wear. Proper upkeep prevents rattles and preserves sound quality over time.
How We Chose the Best Chrysler 300 Cat-back Exhaust System
We focused on systems specifically designed to fit the Chrysler 300 and prioritized real-world attributes that drivers notice. Key evaluation criteria included fitment accuracy to factory mounting points and hangers, construction materials and corrosion resistance, exhaust routing and backpressure characteristics, the expected acoustic profile across idle and wide-open-throttle, and the practicality of installation with common tools. We also considered durability indicators such as weld quality and flange design, and compatibility with factory sensors and hardware. We excluded universal-fit kits that require extensive modification, systems lacking clear material specs, and designs intended for racing use only. The final list includes only full cat-back systems made to bolt into the Chrysler 300 without major chassis or drivetrain alterations.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize correct fitment, durable materials, and a muffler design that matches your desired sound when choosing a cat-back exhaust for a Chrysler 300. Balancing pipe diameter and routing with daily drivability helps avoid unwanted tradeoffs between low-end response and high-end power. Consider installation complexity and sensor compatibility so the system integrates cleanly with the vehicle. Focusing on these core factors will help you select a solution that delivers the tone and performance you want without compromising reliability.
