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Upgrading the exhaust on your Chevrolet Impala can change how the car breathes and how it sounds. You want an exhaust that fits properly, resists corrosion, and produces the tone and flow you expect during daily driving and spirited runs. This guide covers the top shortlisted cat-back exhaust systems for the Chevrolet Impala and explains the practical tradeoffs to consider. We evaluated each option for build quality, fitment accuracy, and expected sound characteristics to help you narrow the field. Read on for what mattered in our selection and the factors that will influence your decision before installation.
Looking for other parts? See all Chevrolet Impala parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Flowmaster Outlaw Series Cat-Back Exhaust System (817688) |  |
| Most Popular A crowd favorite that many people choose with confidence | MBRP S5326AL 2.5" Cat-Back Single Exit Exhaust (Aluminized) |  |
| Best Quality Built to a higher standard if you want something more solid | Borla 14780 T-304 Stainless Cat-Back Exhaust System with Dual Exit Tips |  |
| Best Budget The cheapest option that still gets the job done reliably | MBRP Installer Series S5142AL Aluminized Single-Side Cat-Back Exhaust System |  |
| Most Sold A high-volume bestseller chosen again and again | Flowmaster Outlaw Cat-back Exhaust System |  |
| Best Value for Money The sweet spot between price and what you get | MBRP S5090BLK Black Series Cat-Back Exhaust System |  |
| Best Overall The best all-around choice for most situations | MBRP Black Series 3" Dual Split Rear Race Cat-Back Exhaust System |  |
1. Flowmaster Outlaw Series Cat-Back Exhaust System (817688)
| Manufacturer | Flowmaster |
|---|---|
| Finish Type | Powder Coated |
| Model | 817688 |
| OEM Part Number | 817688 |
| Item Weight | 51.8 pounds |
The Flowmaster Outlaw Series cat-back replaces the factory rear section to deliver a deep, aggressive exhaust note for the Chevrolet Impala while using stainless steel construction for corrosion resistance. It is installed as a direct-replacement cat-back and typically mounts using the vehicle's existing hangers and supplied clamps, providing a significant change in sound character across idle, acceleration, and highway cruising. Notable features include stainless steel piping, black/ceramic tips, and a powder-coated exterior for added durability and appearance. In real-world use the system produces a pronounced rumble that many drivers want for presence and a sportier feel, though several owners report some fitment and clamp issues that may require stronger hardware or minor modification during installation. Expect louder cabin noise and occasional highway drone depending on gearing and cabin insulation. This unit is best for owners looking for a long-lasting, attention-grabbing exhaust and who are comfortable addressing minor fitment tweaks or having a shop finalize the install.
Best for: Reliability-focused buyers who want a durable, long-lasting aftermarket exhaust for a Chevrolet Impala and prioritize solid construction over perfectly quiet operation.
Less Ideal for: Drivers who need a near-silent, factory-like cabin or those unwilling to tolerate or correct minor fitment and hardware issues should consider a more OEM-quiet replacement.
- Stainless steel construction for improved corrosion resistance and longevity.
- Aggressive, deep exhaust tone that increases engine presence under acceleration.
- Powder-coated exterior and black/ceramic tips for a durable, finished look.
- Designed as a direct cat-back replacement to use factory hangers and mounting points.
- Some customers report clamp failures or loose tips requiring welding or stronger fasteners.
- Can produce noticeable highway drone depending on vehicle trim and driving conditions.
- Occasional minor fitment alignment issues that may need adjustment during installation.
Verdict A durable, aggressively tuned cat-back for the Chevrolet Impala that delivers a big sound but may need minor hardware or fitment attention during installation.
2. MBRP S5326AL 2.5" Cat-Back Single Exit Exhaust (Aluminized)
| Installation Type | Bolt-On |
|---|---|
| Finish Type | ALUMINIZED |
| Manufacturer | MBRP |
| OEM Part Number | S5326AL |
This MBRP S5326AL cat-back replaces the factory rear section with mandrel-bent 2.5" tubing and a single-exit muffler to produce a deeper, throatier exhaust note and smoother flow. It installs as a bolt-on system and is typically used to swap the stock muffler and tubing on compatible vehicles; the mandrel bends minimize internal rippling so the exhaust breathes more freely. Practical benefits include noticeably improved sound, simple hardware-based installation for a DIY owner or a quick shop job, and aluminized steel construction that resists dents and corrosion better than basic mild steel. Real-world notes from owners: some trimming of the straight pipe can be required for short-bed or different chassis lengths, it can drone at low speeds or when towing, and the kit does not include the cat/muffler flange gasket. This is a good value if you want a straightforward, louder exhaust without major modifications, but expect some installation fiddling for exact fit and occasional low-speed drone depending on vehicle and cabin sensitivity.
Best for: A convenience-driven buyer who wants an easy, mostly bolt-on upgrade to give their vehicle a fuller, more aggressive exhaust sound without complex fabrication or long shop time.
Less Ideal for: Drivers seeking a perfectly quiet, factory-like cabin or a precision-tuned performance gain should consider a different system or professional tuning; also avoid if you cannot or will not do minor pipe trimming for fitment.
- Mandrel-bent tubing for smoother internal flow and reduced rippling
- Bolt-on installation suitable for competent DIYers or quick shop installs
- Aluminized steel finish that improves resistance to corrosion and dents
- Produces a deeper, more aggressive exhaust tone and perceived throttle response
- Does not include the exhaust flange gasket required for reconnecting to the catalytic converter
- May require cutting or trimming of the straight pipe for certain bed/cab configurations
- Can produce low-speed drone in some vehicle and driving conditions
Verdict A practical, bolt-on way to add deeper tone and improved flow for drivers who want a simple, DIY-friendly exhaust upgrade.
3. Borla 14780 T-304 Stainless Cat-Back Exhaust System with Dual Exit Tips
| Manufacturer | Borla |
|---|---|
| Model | Borla 14780 |
| Material | T-304 stainless steel |
| Tip Style | Split rear exit dual square angle-cut intercooled tip |
This Borla cat-back is a complete aftermarket exhaust intended to replace the factory rear section and deliver a deeper, more aggressive tone plus improved flow. It is typically installed in place of the factory system on compatible vehicles and uses Borla's straight-through muffler design and multi-core technology to reduce backpressure and produce measurable gains in power and torque. The system includes split rear exit square angle-cut intercooled tips and multiple cutoff plates so you can tailor loudness. Construction from T-304 stainless steel gives long-term corrosion resistance for hot exhaust environments. Installation is reported as straightforward for someone comfortable cutting the stock piping or using standard exhaust hangers and clamps, and the kit ships with mounting hardware. Be aware this is a performance-oriented replacement that may require cutting the stock exhaust for fitment and does not include step-by-step instructions in the box, so DIY installers should plan accordingly.
Best for: Performance-oriented buyers who prioritize sound, durability, and measurable gains in power and want a high-quality cat-back that delivers aggressive tone and improved exhaust flow.
Less Ideal for: Drivers seeking a quiet, no-modification, bolt-in replacement for calm daily driving or those who prefer a system that includes full step-by-step installation guidance.
- T-304 stainless steel construction resists corrosion under high-heat conditions
- Straight-through muffler and multi-core design aimed at increasing horsepower and torque
- Includes interchangeable cutoff plates to adjust loudness and tone
- Comes with rear exit dual square angle-cut intercooled tips for a finished look
- May require cutting the factory exhaust for installation on some vehicles
- Does not include detailed installation instructions in the package
- Higher-end performance focus can make it louder than stock for daily commuting
Verdict A durable, performance-focused cat-back for drivers who want a louder, more powerful exhaust note and improved flow, but expect some fabrication and a louder cabin.
4. MBRP Installer Series S5142AL Aluminized Single-Side Cat-Back Exhaust System
| Manufacturer | MBRP |
|---|---|
| Model | S5142AL |
| Exterior | Brushed |
| Material | Aluminized steel |
The MBRP Installer Series S5142AL is a value cat-back exhaust built from aluminized steel to deliver improved flow, a deeper exhaust tone, and a direct-fit installation. It replaces the muffler and tailpipe sections and is intended to connect to factory hangers and hardware included in the kit so most owners can install it with common hand tools. MBRP highlights performance gains such as increased horsepower and torque, reduced backpressure and lower exhaust gas temperatures, which helps when pairing with other bolt-on upgrades. The system produces a pronounced rumble at throttle while remaining tolerable at idle for many users, though some report rasp and occasional drone. Construction is heavier gauge aluminized tubing with sealed seams to resist rust better than basic budget systems, but it is not stainless steel and will age faster in harsh climates. Fitment reviews say it installs quickly and lines up with factory mounts, but buyers should expect to swap only the back half of the system and confirm fitment for their specific vehicle and configuration before purchasing.
Best for: Budget-conscious owners looking for an affordable cat-back that adds sound and usable power without a complicated install; ideal for practical owners who prioritize value over premium materials.
Less Ideal for: Drivers who want the best long-term corrosion resistance or near-silent operation should consider higher-end stainless systems or a different muffler design.
- Direct-fit design uses factory hangers and includes clamps and parts for a simple install
- Aluminized steel with sealed tubing seams for better corrosion resistance than basic budget kits
- Tuned muffler and mandrel-bent tubing reduce backpressure and can improve throttle response
- Produces a deeper, aggressive exhaust note without extreme aftermarket harshness
- Aluminized steel is not stainless so long-term corrosion resistance is limited in salty or very wet environments
- Some users report rasp or drone at certain RPMs
- A few purchasers received bent pieces or extra pipes they did not need
Verdict A cost-minded, direct-fit cat-back that delivers noticeable sound and performance gains for buyers who accept aluminized steel instead of stainless for long-term durability.
5. Flowmaster Outlaw Cat-back Exhaust System
| Fits engines | 4.6L and 5.4L V8 (as listed) |
|---|---|
| Pipe type | Mandrel-bent piping |
| Muffler series | Outlaw Series mufflers |
| Tips | 4.00 inch polished stainless tips |
This Flowmaster Outlaw cat-back is a complete bolt-on exhaust system that replaces the factory back half to deliver a much louder, deeper sound and measurable flow improvements. It installs using included hardware and mandrel-bent piping, and uses race-proven Outlaw Series mufflers plus dual 2.50 inch tailpipes and polished 4.00 inch tips for a commanding exhaust note both inside and outside the car. In practical use it gives a pronounced, aggressive tone and a stronger exhaust flow that can free up a bit of low- and mid-range response compared with a stock system. The 409S stainless construction helps resist corrosion over time and the system is covered by a manufacturer lifetime limited warranty. Be prepared for a loud cabin and exterior sound level and for directional tuning choices that favor bark and presence over subtlety; this is not a mild performance exhaust. Fitment and installation should be checked for compatibility with your specific Impala model and year before purchase.
Best for: A cautious buyer who values a proven, factory-quality replacement that reliably adds aggressive sound and performance presence while minimizing unknown risks.
Less Ideal for: Drivers who prefer a quiet, stock-like cabin or those who need a subtle exhaust note for neighborhood or daily commuting use.
- Complete bolt-on cat-back with all installation hardware included
- Mandrel-bent 2.50 inch piping and race-proven Outlaw mufflers for improved flow
- 409S stainless steel construction provides corrosion resistance
- Designed to produce a deep, aggressive interior and exterior sound
- Very loud and aggressive sound may be intrusive for daily commuting
- Designed tone prioritizes aggression over refined or subtle exhaust character
Verdict A reliable, bolt-on system that delivers loud, race-oriented sound and improved flow but is best if you want an aggressive exhaust rather than a subtle upgrade.
6. MBRP S5090BLK Black Series Cat-Back Exhaust System
| Vehicle fitment | Chevrolet Impala (select models) |
|---|---|
| Pipe diameter | 3" mandrel-bent tubing |
| Tip material | T-304 stainless steel tips |
| Installation | Bolt-on |
The MBRP S5090BLK is a bolt-on cat-back exhaust that replaces the factory system on Chevrolet Impala models and aims to deliver a deeper, more aggressive exhaust note while maintaining everyday drivability. Installation is straightforward for a home mechanic or shop since it uses existing hangers and a bolt-on design, and the mandrel-bent 3" tubing promotes smoother flow compared with crimped bends. The Black Series finish gives a stealth look and the T-304 stainless tips resist corrosion, though the black coat is best for areas without heavy road salt. Drivers report a stronger throat and reduced restriction, but some Impala owners may notice increased cabin resonance or low-speed drone depending on engine and gearing. The system is constructed with sealed seams to limit rust and is intended to be a direct replacement without cutting the factory pipe in most installations. If you want a value-focused upgrade that prioritizes sound and flow, this system delivers a clear performance character with minimal modification, but expect a louder cabin on acceleration and to avoid salt-prone roads to preserve the black finish.
Best for: A practical optimizer looking for strong sound and improved flow on a Chevrolet Impala who values a cost-effective, bolt-on performance upgrade and is willing to accept a louder exhaust character.
Less Ideal for: Buyers seeking a near-silent or strictly factory-like cabin experience, or those in regions with heavy winter road salt who want a long-lasting black finish.
- Bolt-on installation using factory hangers for relatively easy fitment to the Impala
- Mandrel-bent 3" tubing improves exhaust flow compared with stock piping
- T-304 stainless steel tips resist corrosion and maintain appearance
- Sealed seams and construction aimed at durability
- Black coating can deteriorate in salted or chemically treated road conditions
- 3" intermediate pipe may produce noticeable interior drone on some engine/gear combinations
Verdict A budget-friendly cat-back that gives Chevrolet Impala drivers a louder, more free-flowing exhaust and a stealth look, but expect more cabin sound and care for the black finish.
7. MBRP Black Series 3" Dual Split Rear Race Cat-Back Exhaust System
| System type | Cat-back |
|---|---|
| Tubing diameter | 3" |
| Tip size | 4.5" dual tips |
| Finish | High-heat black coating |
The MBRP Black Series cat-back replaces the Impala's factory rear exhaust from the midpipe back to deliver a deeper, more aggressive tone while improving exhaust flow. It is a bolt-on, no-weld system intended for direct fitment to factory hangers and comes with clamps and hardware for a typical home or shop installation. Notable features include mandrel-bent 3" tubing, a race-oriented muffler design tuned to minimize highway drone, and a heat-resistant black coating applied to resist corrosion under high temperatures. In practical use the system gives the Impala a fuller, muscle-car character during acceleration and noticeably improves throttle response compared with the stock setup. Trade-offs are material grade and fitment variability reported by some installers, so expect to check alignment during installation and verify tip positioning. The system can be installed in a couple of hours by someone comfortable with jacking a car, but professional installation is recommended if you want perfect tip alignment or have limited tools.
Best for: A balanced buyer who wants a noticeable sound and performance upgrade for their Impala without major modifications and values a bolt-on, visually distinctive exhaust.
Less Ideal for: Drivers seeking the highest-end stainless construction or perfectly factory-like fitment without any adjustment should consider higher-tier alternatives or professional-fit options.
- Direct bolt-on design that uses factory hangers and includes required clamps for a straightforward install.
- Mandrel-bent tubing and tuned muffler improve exhaust flow and produce a deeper, aggressive sound without excessive highway drone.
- High-heat black coating formulated to resist rust and withstand exhaust temperatures for improved appearance and longevity.
- Some owners report fitment and alignment issues that may require adjustment or minor modifications during installation.
- Material grade may be lower than premium competitors, which could affect long-term corrosion resistance in harsh climates.
Verdict A bolt-on, race-tuned cat-back that gives the Impala a deep, muscular sound and improved flow, but plan for alignment checks and expect mid-tier material quality.
Choosing the Right Chevrolet Impala Cat-back Exhaust System: Key Factors to Consider
Fitment and Model-Specific Compatibility
Fitment matters because a cat-back system designed for the Chevrolet Impala will line up with factory hangers, pipe routing, and bumper cutouts. Poor fitment can lead to exhaust leaks, rattles, or the need for additional adapters and fabrication. Confirming model-year compatibility and whether the system matches sedan or other body styles avoids surprises during installation.
Choosing a system with bolt-on flanges and correct hanger locations minimizes installation time and reduces the chance of exhaust contact with body panels. Fitment also affects legal compliance in some regions where tampering with catalytic converters or emissions-related components is restricted.
Material and Corrosion Resistance
The material of the pipes and mufflers influences lifetime and appearance. Stainless steel variants resist rust and discoloration better than mild steel, which is important if you drive in salted-winter or humid environments. Higher-grade alloys may also hold up longer under high exhaust temperatures.
Consider wall thickness and weld quality as part of material evaluation. Thicker piping and solid welds reduce the chance of cracking and prolong structural integrity, which affects both performance and long-term value.
Exhaust Architecture and Performance Impact
Pipe diameter, bends, and the internal design of mufflers determine flow characteristics and backpressure. A well-chosen cat-back optimizes flow for the Impala's engine size without creating excessive noise or losing low-end torque. Oversized piping can reduce low-rpm response, while too-small piping can become a restriction at higher output levels.
Think about whether you want a modest performance gain or a more aggressive free-flowing setup. The best choice balances horsepower potential with real-world drivability for the vehicle's typical use.
Sound Character and Muffler Design
Muffler construction, internal packing, and resonator use shape the exhaust note. If you prefer a deep, mellow tone, look for systems that emphasize tuned chambers and resonators. For a sharper, louder note, straight-through muffler designs tend to amplify higher frequencies.
Sound preferences should be considered alongside noise regulations and cabin comfort. Some systems provide interchangeable tips or quiet inserts to tailor the tone after installation.
Installation Complexity and Hardware Included
Some cat-back systems are truly bolt-on with all necessary gaskets, clamps, and hangers included. Others may rely on some factory parts or require minor cutting or welding. Assess your own mechanical skill level and available tools when choosing a system.
Kits that include clear instructions and all mounting hardware reduce installation time and the need for aftermarket adapters. Also consider whether the system supports a DIY install or if professional installation is advisable to ensure proper alignment and sealing.
Warranty and Support
A manufacturer warranty provides protection against defects in materials and workmanship. Longer or more comprehensive warranties indicate confidence in build quality and offer peace of mind. Check what the warranty covers, such as corrosion or finish failures, and whether it requires dealer or installer registration.
Availability of customer support and clear return policies matter if you encounter fitment issues or need replacement parts. Documentation and responsive support can significantly reduce downtime and installation headaches.
FAQ
Will a cat-back exhaust system require changes to the catalytic converter on my Chevrolet Impala?
Usually a cat-back system starts after the catalytic converter and does not require changes to the converter itself. Most kits are designed to mate to the factory outlet flange, so in many cases you can retain the OEM catalytic converter and emissions hardware.
How much louder will my Chevrolet Impala be with a cat-back exhaust system?
Loudness depends on muffler design and whether resonators are retained. Some cat-back systems produce a subtle, deeper tone while others are noticeably louder. Expect variation across designs, and check whether the system includes sound-dampening features or tuning options.
Is professional installation necessary for installing a cat-back exhaust on the Chevrolet Impala?
Installation complexity varies. Many cat-back systems are bolt-on and can be installed with basic tools, but alignment and proper sealing are important. If you are uncomfortable with undercar work or lack the required tools, professional installation ensures correct fitment and reduces the risk of leaks.
Will changing to a cat-back exhaust affect engine performance on the Chevrolet Impala?
A well-matched cat-back can improve exhaust flow and potentially yield modest performance benefits, especially at higher RPMs. However, gains depend on the engine and the rest of the exhaust system. Expect incremental improvements rather than dramatic power increases without other supporting modifications.
What should I check to ensure the cat-back system resists corrosion?
Look for stainless steel construction or protective coatings, consistent weld quality, and thicker wall tubing. Confirm whether the manufacturer specifies a corrosion-resistant grade and whether the hardware and clamps are similarly treated to prevent premature rust.
How We Chose the Best Chevrolet Impala Cat-back Exhaust System
We focused on parts specifically designed to fit the Chevrolet Impala and prioritized attributes that affect real-world ownership. Our evaluation included build material and corrosion resistance, as these determine long-term durability in varied climates. We assessed fitment accuracy and mounting hardware so installation is straightforward and requires minimal modification. We considered exhaust architecture and muffler design because these shape both flow and sound character. We also reviewed claims about backpressure and expected performance impact, favoring systems that balance power delivery with drivability. We excluded universal-fit kits and components that require extensive fabrication or do not provide clear fitment for the Impala. Systems that lacked verifiable material specs or omitted essential mounting hardware were also removed from consideration. The remaining picks meet our standards for compatibility, construction, expected acoustic behavior, and installation practicality.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize fitment, material quality, and the sound profile when choosing a Chevrolet Impala cat-back exhaust system. Decide whether you want a subtle change focused on longevity and comfort or a more aggressive setup that emphasizes tone and flow. Weigh installation complexity and warranty support against the expected performance and acoustic outcomes. Focusing on those tradeoffs will help you pick a system that aligns with your driving habits and long-term ownership goals.
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