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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 overall The best all-around choice for most situations | MBRP S7275BLK 3" Cat-Back Race Exhaust System with 4.5" Black Tips |  |
| Best Quality Built to a higher standard if you want something more solid | MagnaFlow Street Series Cat-Back Exhaust System 16667 for 2006-2009 Mitsubishi Eclipse |  |
| Best Value The sweet spot between price and what you get | MBRP S5014AL 3" Cat-Back Single-Side Exhaust System (Aluminized Steel) |  |
| Best Budget The cheapest option that still gets the job done reliably | Auto Dynasty Catback Exhaust System for Mitsubishi Eclipse (2000–2005) 4-Cylinder |  |
| Highest Rated 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 | DNA Motoring Stainless Steel Cat-Back Exhaust System for 00-05 Mitsubishi Eclipse V6 |  |
| Best Seller A high-volume bestseller chosen again and again | DNA MOTORING Stainless Steel Cat-Back Exhaust System for 2006–2009 Mitsubishi Eclipse 2.4L |  |
1. 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.
2. MagnaFlow Street Series Cat-Back Exhaust System 16667 for 2006-2009 Mitsubishi Eclipse
| Compatible Vehicle | 2006-2009 Mitsubishi Eclipse L4 2.4L |
|---|---|
| Main Piping Diameter | 2.5" |
| Tip Diameter | 4" |
| Material Type | Stainless Steel |
| Exit Style | Single Straight Passenger Side Rear |
The MagnaFlow Street Series cat-back (part 16667) replaces the factory rear exhaust with a 2.5-inch piping, dual straight-through mufflers and a polished 4-inch welded tip to give the 2006–2009 Mitsubishi Eclipse a fuller, deeper exhaust note and improved flow dynamics. It is a vehicle-specific fit that installs with clamp-on inlets and includes a hardware kit for bolt-on installation. Built from stainless steel with CNC robotic construction, the system is corrosion resistant and backed by a limited lifetime construction warranty for long-term durability. On the road it tends to deliver a comfortable cabin sound at low throttle with a stronger, sporty tone past 3000 rpm and modest gains in higher RPM power due to reduced backpressure. The Street Series is tuned for a refined performance voice rather than extreme loudness, so drivers seeking a dramatic volume increase may need additional modifications. Fitment is specific to the Eclipse and the clamp-on inlet means careful alignment during installation to avoid leaks.
Best for: Performance-oriented owners who prioritize quality construction and a refined but aggressive exhaust note for spirited street driving and occasional track use.
Less Ideal for: Buyers who want an extreme, race‑level loud exhaust as a standalone modification or those seeking a universal-fit system for multiple vehicles.
- Vehicle-specific fit for 2006–2009 Mitsubishi Eclipse for easier installation
- Stainless steel construction with CNC precision for corrosion resistance and consistent build quality
- Dyno-proven design and 2.5-inch piping that can improve high-RPM power and exhaust flow
- Dual straight-through mufflers and polished 4-inch tip provide a deep, clean performance tone
- Includes hardware kit and uses clamp-on inlet for bolt-on installation
- Street Series tuning prioritizes a refined sporty note over loud volume for those who want maximum sound
- Clamp-on inlet requires careful alignment and may need clamps or gasket adjustments to prevent leaks
Verdict: A vehicle-specific, stainless-steel cat-back that delivers durable construction and a deep, dyno-proven performance tone tailored for the 2006–2009 Mitsubishi Eclipse.
3. 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.
4. Auto Dynasty Catback Exhaust System for Mitsubishi Eclipse (2000–2005) 4-Cylinder
| Compatible Vehicles | 2000-2005 Mitsubishi Eclipse 4-Cylinder |
|---|---|
| Material | T-304 Stainless Steel |
| Inlet Size | 2.25" (ID) |
| Main Piping | 2.25" (ID) |
This Auto Dynasty cat-back replaces the factory exhaust on 2000–2005 Mitsubishi Eclipse 4-cylinder cars and is intended to increase flow, add sound, and free up some low-end torque. It uses mandrel-bent T-304 stainless piping, CNC-flanged joints, and a rolled 4-inch muffler tip to provide a deeper, more aggressive tone while remaining corrosion resistant compared with mild steel systems. Installation is typical of cat-back swaps and should be straightforward for a shop or a competent DIYer, but fitment has reported issues so careful measurement and possible minor modification may be required. The system is marketed as performance-oriented and claims dyno gains, though expect modest real-world power gains on a naturally aspirated 2.4L. Important limitations are that it is not CARB compliant for California emission models and user feedback indicates fitment and quality control can be inconsistent at this price point.
Best for: Budget-conscious Mitsubishi Eclipse owners wanting a louder, factory-replacement style cat-back to improve sound and perceived performance without paying for high-end name-brand systems.
Less Ideal for: Drivers in California or regions enforcing CARB rules and buyers who need guaranteed perfect fitment and factory-quality fit finish without any modifications.
- Mandrel-bent T-304 stainless steel piping for improved corrosion resistance and smoother flow
- CNC-machined flange and TIG welds aimed at stronger joints and leak resistance
- Rolled 4-inch muffler tip delivers a deeper, more aggressive exhaust note
- Full cat-back design replaces from the catalytic converter back for easier installation and sound change
- Reported fitment problems for some 2000–2005 Eclipse models that may require modification
- Not CARB compliant and therefore not legal for California emission models
Verdict: A cost-conscious full cat-back that noticeably alters sound and flow for 2000–2005 Mitsubishi Eclipse 4-cylinder models at a bargain price.
5. 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.
6. DNA Motoring Stainless Steel Cat-Back Exhaust System for 00-05 Mitsubishi Eclipse V6
| Fitment | 00-05 Mitsubishi Eclipse V6 |
|---|---|
| Material Type | Stainless Steel (T-304) |
| Tip Diameter | 4" OD |
| Included Components | 1 x Catback Exhaust System |
This DNA Motoring cat-back replaces the factory rear exhaust on 2000–2005 Mitsubishi Eclipse V6 models with larger-diameter piping, low-restriction mufflers, and dual slant tips to produce a deeper, more aggressive tone and improved flow. It is typically used as a bolt-in performance upgrade to reduce backpressure and recover horsepower and torque; the manufacturer claims a dyno-proven 15–25 hp increase at the wheels. Built from T-304 stainless steel with mandrel bends and TIG-welded flanges, the system should resist common corrosion better than mild steel units. Buyers should expect some fitment fiddling during installation: several reviewers note tight clearances, occasional misaligned holes, and the need to modify or rotate sections to clear the axle or bumper. The sound is mid-to-deep and can be tuned by using or removing the resonator or silencer. Hardware and gaskets are included but no installation instructions, so a lift or at least good clearance and basic fabrication skills or a shop visit make the process far easier.
Best for: Convenience-driven buyers who want a straightforward performance and sound upgrade for their Eclipse V6 without chasing high-end brands and who prefer a product that largely bolts in with minimal fabrication when professional help is available.
Less Ideal for: Users seeking a perfect factory-fit, turn-key installation without any adjustments or those who demand premium-grade hardware and flange construction for maximum longevity.
- T-304 stainless steel piping and mandrel bends for improved flow and corrosion resistance
- Larger-diameter pipes and tuned resonators that reduce backpressure and can increase horsepower
- Dual 4" slant muffler tips for a more aggressive, finished appearance
- Includes gaskets and hardware for a mostly complete installation
- Fitment can be tight or require minor modification and adjustment to align hangers and clear the bumper or axle
- Some non-stainless flanges and hardware reported by users may reduce long-term corrosion resistance
- No installation instructions included, which adds complexity for DIY installers
Verdict: A budget-friendly stainless steel cat-back for 2000–2005 Eclipse V6 that delivers stronger flow, louder tone, and noticeable performance gains with some real-world fitment work.
7. DNA MOTORING Stainless Steel Cat-Back Exhaust System for 2006–2009 Mitsubishi Eclipse 2.4L
| Compatible with Vehicle Type | 06-09 Mitsubishi Eclipse 2.4L l4 |
|---|---|
| Material Type | Stainless Steel (T-304) |
| Configuration | 06-09 Mitsubishi Eclipse 2.4L l4 |
| Included Components | Cat back exhaust system and installation hardware |
This DNA MOTORING cat-back replaces the factory rear exhaust on 2006–2009 Mitsubishi Eclipse 2.4L cars with a mandrel-bent T-304 stainless steel system that includes flanges, hardware, and dual mufflers. It is typically used to reduce backpressure, produce a louder deep tone under acceleration, and add a sporty look with a 4-inch tip. The stainless construction and TIG-welded CNC flange should resist corrosion better than stock mild-steel parts, and customers report straightforward fitment when minor drill-or-bore adjustments are made at the header flange. Expect a noticeable bump in low-end torque and mid-range throttle response and a sound that is quiet during cruising but pronounced under load. Installation may require a professional or moderate fabrication since instructions are not included and some holes can need enlargement. The system can be loud in convertibles or for those who prefer a subtle exhaust, so check noise expectations before fitting.
Best for: Risk-averse mainstream buyers who want a reliable, factory-quality replacement that adds power and a sportier exhaust note without chasing extreme or race-only performance.
Less Ideal for: Drivers who need a near-silent or OEM-level quiet exhaust, owners unwilling to pay for professional installation, or those who prefer a custom-tuned system for maximum gains.
- T-304 stainless steel construction with mandrel bends for improved durability and flow
- Dyno-proven claim of increased low-end horsepower and torque
- Includes flanges and installation hardware for a mostly complete replacement
- Dual muffler design yields a deep, aggressive tone while remaining relatively quiet at cruise
- Installation instructions are not included and some flange holes may need drilling or modification
- Can be very loud in open-top or lightly insulated cabins
- Fitment may require minor adjustments despite being made for the specified Eclipse model
Verdict: A durable, vehicle-specific stainless steel cat-back that raises low-end power and gives the Eclipse a deeper, more aggressive exhaust note while keeping everyday drivability.
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.
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.
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.
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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