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If you want a targeted exhaust upgrade for your Mitsubishi Eclipse, choosing the right cat-back exhaust system matters for drivability, tone, and durability. The right system improves exhaust flow, refines engine note, and can simplify installation without altering factory emissions equipment. This guide covers seven shortlisted cat-back exhaust systems selected for their fitment, material quality, and expected sound characteristics. We evaluated each option across practical criteria so you can pick a system that matches your driving goals. Read on for a concise look at what to expect and which features to prioritize.
Looking for other parts? See all Mitsubishi Eclipse parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | MBRP S5200AL 3" Cat-Back Single-Side Exhaust System (Aluminized Steel) |  |
| Most Popular A crowd favorite that many people choose with confidence | MBRP Black Series Cat-Back Exhaust System (S5090BLK) |  |
| Best Quality Built to a higher standard if you want something more solid | MBRP S5326AL 2.5" Cat-Back Single-Side Exhaust System (Aluminized) |  |
| Best Budget The cheapest option that still gets the job done reliably | DNA Motoring CBE-TSX Stainless Steel Cat-Back Exhaust System |  |
| Most Sold A high-volume bestseller chosen again and again | MagnaFlow Street Series Cat-Back Performance Exhaust System (Part 19018) |  |
| Best Value for Money The sweet spot between price and what you get | MBRP S5014AL 3" Cat-Back Single-Side Exhaust System (Aluminized Steel) |  |
| Best Overall The best all-around choice for most situations | MBRP S7275BLK 3" Cat-Back Race Exhaust System with 4.5" Black Tips |  |
1. MBRP S5200AL 3" Cat-Back Single-Side Exhaust System (Aluminized Steel)
| Installation Type | Clamp-On |
|---|---|
| Finish Type | ALUMINIZED |
| Manufacturer | MBRP |
The MBRP S5200AL is a clamp-on cat-back exhaust system built from heavy gauge aluminized steel to deliver a deeper, more responsive exhaust tone while accelerating evacuation of hot gases to help the engine run cooler. It installs as a direct-fit kit to factory hangers with supplied clamps and hardware so installation can be completed with common hand tools and some trimming depending on body configuration. The system is tuned to provide a pronounced but not extreme rumble and is claimed to improve throttle response and fuel economy modestly. Aluminized construction and seam protection reduce corrosion risk compared with thinner competitors, though it is not stainless steel so long-term corrosion resistance will be less than premium stainless systems. Some users report a mild drone at certain highway speeds and occasional fitment tweaks or minor hanger adjustments may be required. For Eclipse owners wanting a reliable, budget-conscious performance upgrade, this system balances sound and durability, but those wanting the quietest highway refinement or stainless longevity may prefer alternatives.
Best for: Reliability-focused buyers who prioritize a durable, reasonably priced performance upgrade and want a system that installs with basic tools and stays serviceable over time.
Less Ideal for: Buyers seeking the highest corrosion resistance or the quietest long-distance highway refinement should consider stainless systems or dedicated low-drone mufflers instead.
- Clamp-on, direct-fit design uses factory hangers and supplied clamps for a straightforward install
- Heavy gauge aluminized steel with sealed seams offers improved corrosion protection over thin aluminized kits
- Tuned for a rich, mellow rumble that improves throttle response and perceived power
- Includes all necessary clamps and parts for common cab/bed configurations
- Aluminized steel is less corrosion-resistant long term than stainless steel options
- Some configurations report a noticeable drone at highway cruise RPMs
- Occasional trimming or hanger adjustment may be required for a perfect fit
Verdict A cost-effective, installer-friendly cat-back that gives reliable performance and a fuller exhaust note, with aluminized construction as the balance between price and durability.
2. MBRP Black Series Cat-Back Exhaust System (S5090BLK)
| Fitment note | Cat-back system, bolt-on installation |
|---|---|
| Tubing | Mandrel-bent 3" tubing |
| Tips | T-304 stainless steel tips |
| Finish | Black coated with sealed seams |
This MBRP Black Series cat-back is a bolt-on replacement exhaust that swaps in place of the factory system to deliver a deeper, more aggressive exhaust note and freer-flowing 3" mandrel-bent piping. It is typically used by owners who want a louder, performance-oriented sound and a visual blacked-out tip. Installation is straightforward and hardware is included for a bolt-on fitment, so a competent DIYer can install it without fabrication. Notable features include T-304 stainless steel tips, mandrel-bent tubing for smoother flow, and a black coating with sealed seams intended to resist rust in non-salt environments. Practical benefits are an unmistakable performance sound and improved exhaust flow compared with a restrictive stock system, plus easier install than systems that require welding. Limitations include a louder cabin presence and possible drone at certain rpm ranges, a 3" intermediate pipe that may be oversized for smaller engines, and susceptibility of the black tip finish to wear in harsh conditions, so the visual coating may require touch-up over time.
Best for: A convenience-driven buyer who prioritizes an easy bolt-on upgrade to get a louder, performance sound and a blacked-out look without complex installation or fabrication.
Less Ideal for: Drivers seeking a quiet, refinement-focused daily setup or those who frequently drive on salted roads and want a corrosion-proof exterior finish should consider other options.
- Bolt-on design with included hardware simplifies DIY installation
- Mandrel-bent 3" tubing improves exhaust flow compared with restrictive stock piping
- T-304 stainless steel tips for corrosion resistance at the outlet
- Black coated finish and sealed seams designed to resist rust in non-salt driving areas
- 3" intermediate pipe can produce interior drone and may be overlarge for smaller engines
- Black coating on the tip can deteriorate with normal use or exposure to harsh chemicals
Verdict If you want a straightforward, bolt-on way to add a deep performance tone and blacked-out styling, this MBRP cat-back delivers, but expect louder cabin sound and possible drone on smaller engines.
3. MBRP S5326AL 2.5" Cat-Back Single-Side Exhaust System (Aluminized)
| Installation Type | Bolt-On |
|---|---|
| Finish Type | ALUMINIZED |
| Manufacturer | MBRP |
This MBRP S5326AL cat-back replaces the rear section of the exhaust with mandrel-bent 2.5-inch piping and a single-side aluminized muffler to increase exhaust flow and give a deeper, more aggressive tone. It is intended as a bolt-on upgrade and typically installs in a few hours with common hand tools; some installers report cutting the straight pipe for short-bed or different chassis lengths. The mandrel bends reduce internal rippling so the system breathes better than many stamped-pipe replacements, which can translate to crisper throttle response on tuned engines. The aluminized finish offers corrosion resistance without the cost of stainless steel, but it will not be as long-lived in salty climates. Notable limitations are that it does not include a flange gasket in some shipments and some users report low-speed drone depending on vehicle setup and cabin insulation. Fitment must be checked carefully for the Mitsubishi Eclipse since this unit was produced for Toyota Tacoma platforms and may require modification to fit Eclipse chassis and exhaust routing.
Best for: A performance-oriented buyer who prioritizes improved exhaust flow and a richer sound and is willing to modify or adapt parts for a custom fit on their Eclipse.
Less Ideal for: Buyers seeking a direct, out-of-the-box fit for a Mitsubishi Eclipse without modification should look for systems specifically engineered for that model.
- Mandrel-bent 2.5-inch tubing maintains smooth internal contours for better exhaust flow
- Aluminized steel construction provides corrosion resistance at a lower cost than stainless
- Bolt-on design enables relatively quick installation with basic tools
- Produces a deeper, more aggressive exhaust tone and perceptible throttle response
- Designed for Tacoma platforms so substantial modification may be required for an Eclipse
- Aluminized steel is less durable than stainless in harsh, salty environments
- Some owners report low-speed drone or an unpleasant tone on certain setups
Verdict Great-flowing, budget-friendly aluminized cat-back that delivers a deeper tone and performance feel but will likely need modification to fit an Eclipse and is less durable than stainless options.
4. DNA Motoring CBE-TSX Stainless Steel Cat-Back Exhaust System
| Compatible with | 04-08 Acura TSX CL9 2.4L |
|---|---|
| Material | T-304 stainless steel |
| Construction | Computerized mandrel-bends with TIG welded flanges |
| Performance claim | Dyno proven 15-25 horsepower increase |
This DNA Motoring cat-back replaces the factory rear section with larger-diameter piping, low-restriction mufflers, and tuned resonators to reduce backpressure and change the exhaust note. It is intended for bolt-up installation to the car's existing exhaust path and is typically used to free up low-end torque and add a deeper, more aggressive sound. The system is made from T-304 stainless steel with mandrel bends and TIG-welded flanges, which helps resist corrosion and hold up under normal driving. Users report noticeable sound and modest responsiveness gains, though peak horsepower claims will vary by supporting modifications. Fitment and alignment can require adjustments at hangers and flanges and some owners needed an extra resonator to reduce cabin drone. Installation is consumer-possible but professional fitting is recommended for correct alignment and to avoid hardware issues. For a budget option this system delivers strong visual and acoustic changes, but expect some fitment fiddling and potential interior drone unless tuned with additional resonation.
Best for: Budget-conscious modifiers seeking a low-cost way to change their Eclipse’s sound and get modest responsiveness gains while accepting some hands-on fitting and setup.
Less Ideal for: Drivers who prioritize a perfectly refined factory-like fit and quiet cabin experience should consider higher-end, better-tuned systems or professional-fit options.
- T-304 stainless steel construction and TIG-welded flanges resist corrosion and improve longevity compared with mild steel
- Larger-diameter piping and low-restriction mufflers increase exhaust flow for improved throttle response
- Aggressive deep tone that enhances the car’s sound character
- Complete cat-back design bolts to the factory front section so no header or midpipe replacement is required
- Fitment often requires adjustment at hangers and flanges and may not align perfectly out of the box
- Can produce significant cabin drone around mid RPMs without adding an extra resonator
- Installation hardware and instructions are limited so professional installation or aftermarket hardware may be needed
Verdict A very affordable stainless cat-back that gives the Eclipse a deeper, louder tone and some performance feel but requires careful fitting and may need extra resonation to control drone.
5. MagnaFlow Street Series Cat-Back Performance Exhaust System (Part 19018)
| Installation Type | Bolt-On |
|---|---|
| Main Piping Diameter | 3" |
| Tip Diameter | 4" |
| Tip Type | Welded, Double Wall, Angle Cut, Rolled Edge |
| Muffler Type | Straight-Through |
This MagnaFlow Street Series cat-back system replaces the factory rear exhaust and is intended to deliver dyno-proven gains with a restrained, street-friendly sound. It installs as a bolt-on unit and is typically used to reduce exhaust restriction, add a fuller exterior tone, and slightly improve throttle response on the vehicle. Notable features include stainless steel construction for corrosion resistance, 3-inch main piping, a straight-through muffler design, and a polished 4-inch double-wall tip. Practical benefits are long-term durability from stainless materials and a tuned sound level that increases presence without being race-level loud, making daily driving comfortable. Some owners report hanger alignment and minor weld finish issues, so careful fitment checks during installation are advisable and professional installation may be preferred for a flawless fit. This system is designed to work with the specified vehicle application and aims to balance improved flow, reliability, and refined sound rather than extreme volume.
Best for: Risk-averse mainstream buyers seeking a conservative, factory-quality upgrade that improves sound and flow without making the car excessively loud.
Less Ideal for: Drivers looking for an aggressive, race-level exhaust note or a budget bolt-on with unverified fitment should consider other options.
- Stainless steel construction resists corrosion for long service life
- 3-inch mandrel-bent piping and straight-through muffler reduce exhaust restriction
- Polished 4-inch double-wall tip for a finished appearance
- Street-tuned sound profile that increases exterior tone without excessive cabin noise
- Some users reported hanger alignment issues requiring minor adjustment during installation
- Occasional cosmetic weld or tip blemishes reported on arrival
Verdict A durable, street-tuned cat-back that delivers a fuller sound and improved flow while prioritizing reliable, factory-style fitment.
6. MBRP S5014AL 3" Cat-Back Single-Side Exhaust System (Aluminized Steel)
| Installation Type | Clamp-On |
|---|---|
| Finish Type | Polished |
| Piping Diameter | 3" |
| Manufacturer | MBRP |
This MBRP S5014AL cat-back replaces the stock mid- and rear-exhaust sections with a clamp-on 3-inch system that uses factory hangers for a straightforward installation. It is typically used to add a deeper, performance-oriented tone and modest power gains by improving exhaust flow. The system is built from heavy gauge aluminized steel with a polished stainless tip, so it delivers a richer sound without the premium cost of full stainless systems. Installation is mostly hand-tool work and usually bolts up to existing hangers and flanges, though some buyers have needed a 3-inch gasket or to address seized flange studs on older cars. Practical benefits include a noticeable low-end rumble, reduced backpressure for potential small horsepower and torque gains, and improved exhaust routing that can help engine cooling. Limitations are that the aluminized construction is less corrosion resistant than full stainless and some vehicles report slight idle drone or fitment variations depending on exact chassis and year, so expect occasional extra parts or minor adjustment during install.
Best for: Practical optimizers who want measurable sound and modest performance gains without paying for premium stainless systems and who prioritize straightforward bolt-on upgrades.
Less Ideal for: Buyers seeking maximum corrosion resistance or the lightest, longest-lasting premium system should consider full stainless alternatives instead.
- Bolt-on clamp-on design that fits factory hangers for simple installation
- 3-inch piping improves exhaust flow for noticeable low-end tone and small power gains
- Includes polished stainless tip for a finished look without full stainless cost
- Heavy gauge aluminized construction with protective seam coating for improved durability over thin competitors
- Aluminized steel corrodes faster than full stainless so long-term resistance is lower
- Some applications may require a 3-inch exhaust gasket or minor flange work to stop leaks
- Fitment can vary by vehicle submodel which may require adjustments during install
Verdict A cost-conscious cat-back that delivers improved flow and a deeper tone with easy bolt-on installation, but it trades off long-term corrosion resistance versus stainless systems.
7. MBRP S7275BLK 3" Cat-Back Race Exhaust System with 4.5" Black Tips
| Tip diameter | 4.5 inches |
|---|---|
| Tube diameter | 3 inches |
| Finish | Black high-heat coating |
| Fitment type | Cat-back, bolt-on |
The MBRP S7275BLK Race cat-back replaces the factory rear exhaust on a Mitsubishi Eclipse to open up flow and give the car a deeper, more aggressive tone. It is a bolt-on, no-weld system that uses mandrel-bent 3-inch tubing, direct-fit hangers and supplied clamps for a typical one-and-a-half to two-hour install. The black high-heat coating and sealed seams aim to resist corrosion while the tuned muffler design balances an aggressive sound under load with relatively low highway drone. In practice this system will make an Eclipse feel louder and more responsive and can complement intake or tuning upgrades. Some buyers report minor fitment and alignment fiddling during installation and the material grade is not the highest-end stainless available, so long-term corrosion resistance may vary. Also this is a performance-oriented exhaust so expect a pronounced change in cabin and exterior sound compared with stock.
Best for: Balanced buyers who want a noticeable performance and sound upgrade for their Mitsubishi Eclipse without extensive modification and who value a strong daily-drivable tone.
Less Ideal for: Drivers seeking the absolute top-tier stainless construction for long-term corrosion resistance or those wanting a completely silent, stock-like exhaust should consider alternative options.
- Mandrel-bent 3-inch tubing improves exhaust flow for better throttle response.
- Bolt-on, no-weld design fits factory hangers and includes clamps for straightforward installation.
- Black high-heat coating with sealed seams resists rust and keeps a uniform look.
- Tuned muffler offers a deep, muscular tone with relatively low highway drone.
- Not made from the highest-grade stainless so long-term corrosion resistance may be less than premium systems.
- A few owners report occasional fitment or alignment issues requiring adjustment during install.
- Tips fasten with clamps which may need checking after initial break-in.
Verdict A bolt-on, race-tuned cat-back that delivers a deep, aggressive sound and better flow for the Mitsubishi Eclipse while trading premium stainless longevity for value and style.
Choosing the Right Mitsubishi Eclipse Cat-back Exhaust System: Key Factors to Consider
Vehicle-Specific Fitment
Ensuring the exhaust system is designed for the Mitsubishi Eclipse matters because improper fit can lead to vibration, leaks, or clearance issues. A system with vehicle-specific flanges and hanger locations minimizes trimming and keeps the installation straightforward.
Fitment also affects emissions compliance and post-installation drivability. Selecting a direct-fit unit reduces the risk of interference with suspension or heat-sensitive components and helps maintain proper exhaust routing under load and during chassis flex.
Construction Material and Corrosion Resistance
Material choice influences longevity and appearance. Systems made from higher-grade stainless steel resist rust and discoloration, which matters in regions with road salt or humid climates. Thicker wall tubing and robust welds also withstand road debris and thermal cycling better than thinner materials.
Consider protective finishes and mounting hardware quality as well. Corrosion-resistant clamps, hangers, and welded joints reduce the chance of early failure and help preserve sound characteristics over time.
Internal Diameter and Flow Characteristics
The tubing diameter and internal profile determine how the exhaust gases flow and how the engine breathes. A diameter that is too small can increase backpressure and limit power, while an overly large diameter can reduce low-end torque and make throttle response sluggish.
Choose a system with diameter recommendations suited to the Eclipse engine displacement and intended use. Manufacturers will often balance midrange response and top-end flow; pick the compromise that best matches your driving style, whether daily driving or spirited runs.
Muffler Design and Sound Profile
Muffler type shapes the cat-back exhaust system’s audible character at idle, cruise, and full throttle. Chambered, straight-through, and baffled designs each produce distinct tones, from mellow to aggressive. Consider how loudness interacts with cabin noise, drone on highway speeds, and neighborhood or regulatory constraints.
Look for systems that describe expected sound levels across operating ranges rather than only peak volume. Some designs include resonators or removable baffles to fine-tune tone and reduce unwanted drone.
Installation Complexity and Hardware
Installation ease matters for owners who plan to fit the system themselves or prefer a quick shop install. Direct-fit systems that use factory hanger points, pre-flanged joints, and included gaskets reduce labor time and the need for additional parts. Conversely, systems that require cutting, welding, or custom hangers increase cost and installation risk.
Also consider weight and accessible mounting points during installation. Lighter components are easier to handle, and clear instructions or available support can make a big difference in a successful, leak-free install.
Compatibility with Emissions and Accessories
A cat-back system should maintain the location and function of any emissions components that precede it. Retaining factory catalytic converter placement ensures compliance with local regulations and preserves sensor operation.
Additionally, confirm compatibility with heat shields, underbody covers, and any rear bumper valances to avoid fitment issues. Systems that accommodate common accessories reduce the chance of post-install modifications and preserve vehicle functionality.
FAQ
Will a cat-back exhaust system change my Mitsubishi Eclipse’s sound a lot?
A cat-back exhaust usually alters tone and volume because it replaces the portion of the exhaust behind the catalytic converter. The degree of change depends on muffler design, tubing diameter, and whether resonators are included. Expect more pronounced differences under acceleration and less change at idle if the system is tuned for balanced sound.
How difficult is catback exhaust installation on a Mitsubishi Eclipse?
Installation difficulty varies by system but many cat-back units designed for the Mitsubishi Eclipse are direct-fit and use factory hanger locations. These typically require basic tools and moderate mechanical skill. Systems that need cutting, special adapters, or welding will be more complex and may be better handled by a professional.
Does switching to a performance exhaust system affect engine performance?
A well-matched cat-back can improve exhaust flow and slightly affect throttle response or peak power, depending on engine characteristics and system design. Gains are usually modest and depend on overall engine tuning and diameter choices. Significant performance changes often require complementary modifications and tuning.
Should I choose stainless steel cat back or another material?
Stainless steel typically offers better corrosion resistance and longer life compared with mild steel, which makes it a common choice for durability. Consider your local climate, expected vehicle lifespan, and whether you prioritize long-term appearance when choosing materials.
Can a cat-back exhaust cause drone on long drives?
Some designs can produce noticeable drone at certain cruising RPMs. Drone often results from resonant frequencies in the exhaust path and muffler design. Look for systems that include resonators, tuned mufflers, or mention reduced drone to minimize this issue.
How We Chose the Best Mitsubishi Eclipse Cat-back Exhaust System
We shortlisted products that specifically fit the Mitsubishi Eclipse and focused on features that matter to drivers upgrading the exhaust. Primary evaluation criteria included exact vehicle fitment and compatibility with factory hangers, construction material and corrosion resistance, expected sound profile at cruise and full throttle, and the routing and connector design for ease of installation. We also considered backpressure and internal diameter recommendations relevant to the Eclipse engine size, plus the availability of direct-fit gaskets or adapters to avoid additional modifications. Exclusions included systems that require extensive custom fabrication, those that do not retain catalytic converter placement, and options with unverified fitment claims. Our goal was to present viable cat-back choices that balance performance, longevity, and installation complexity for typical owners of the Mitsubishi Eclipse.
Our full evaluation process is outlined in our review methodology.
Conclusion
Choosing the right cat-back exhaust system for a Mitsubishi Eclipse means balancing fitment, material quality, and the sound you want from daily driving to spirited acceleration. Prioritize systems that provide direct-fit compatibility, durable construction, and a muffler design that matches your noise tolerance. Keep in mind tradeoffs between low-end response and peak flow when selecting tubing diameter, and weigh installation complexity against long-term durability. Focusing on these criteria will help you select an exhaust that meets both performance and practical needs.
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