Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
If you drive a Lincoln MKZ and want fuller exhaust tone or better throttle response, choosing the right cat-back exhaust system matters. The wrong fit or material can lead to poor sound, fitment problems, or accelerated corrosion, while the right system balances tone, durability, and installation simplicity. This guide covers six shortlisted cat-back exhaust systems chosen for fit to the Lincoln MKZ, material quality, sound characteristics, and installation considerations. Read on for the key tradeoffs to weigh before you make a selection and to prepare for the installation process.
Looking for other parts? See all Lincoln MKZ parts & accessories.
Top Picks at a Glance
| Best overall The best all-around choice for most situations | Flowmaster Outlaw 817689 Stainless Steel Cat-Back Exhaust System |  |
| Best Quality Built to a higher standard if you want something more solid | BRExhaust Direct-Fit Replacement Cat-Back Exhaust System Kit (106-0762) |  |
| Best Value The sweet spot between price and what you get | Flowmaster FlowFX 717887 Cat-Back Exhaust System |  |
| Best budget The cheapest option that still gets the job done reliably | MBRP S5236AL 3" Aluminized Steel Single Side Exit Cat-Back Exhaust System |  |
| Highest Rated A top-rated pick with lots of positive feedback | MAC Flex Resonator Dual Rear Muffler Cat-Back Exhaust for Lincoln MKZ 2007–2012 3.5L |  |
| Best Seller A high-volume bestseller chosen again and again | BRExhaust Direct-Fit Replacement Cat-Back Exhaust System Kit (106-0642) |  |
1. Flowmaster Outlaw 817689 Stainless Steel Cat-Back Exhaust System
| Automotive Fit Type | Vehicle Specific Fit |
|---|---|
| OEM Equivalent Part Number | 817689 |
| Material Type | Plastic |
| Shape | Oval |
The Flowmaster Outlaw 817689 cat-back replaces the factory rear exhaust from the catalytic converter back with mandrel-bent stainless piping, a Super 10 performance muffler, and large ceramic-coated 4.00-inch dual tips that can be routed out the rear or the side. It is typically used to increase exterior volume and add a deeper, more aggressive tone while retaining factory hanger locations for straightforward alignment. Notable features include all-stainless construction for corrosion resistance, captured-bolt clamps for easier installation, and a muffler designed to balance loudness with manageable in-cabin noise. In practice the system installs in a few hours with basic tools or a lift and yields a pronounced cold-start bark and strong under-throttle sound without excessive highway drone in many setups. Limitations to consider are that some buyers report fitment alignment issues around spare tire or tip positioning on certain vehicles and a handful report surface rust developing on some hardware, so expect to check clamp tightness and possibly replace or paint small components over time. This system favors drivers who want a noticeable, performance-oriented sound and factory-style fitment.
Best for: Balanced all-round buyers who want a factory-quality upgrade that delivers a bold, trucklike exhaust note without complex installation headaches or constant tinkering.
Less Ideal for: Drivers seeking a completely silent or ultra-refined luxury cabin experience or those who need a custom-fit system for heavily modified undercarriage layouts should consider other options.
- All-stainless construction and mandrel bends maintain flow and resist major corrosion
- Dual exit tip routing (rear or side) gives visual and acoustic flexibility
- Super 10 muffler produces a deep, aggressive tone with manageable in-cabin presence
- Uses factory hanger locations and captured-bolt clamps for a simpler DIY installation
- Some users report fitment clearance issues around the spare tire or tip alignment that may require adjustments
- Included clamps and hangers may develop surface rust or feel lower grade compared with the main piping
Verdict: A durable, vehicle-specific cat-back that gives the Lincoln MKZ a much more aggressive exhaust note with straightforward factory-style installation.
2. BRExhaust Direct-Fit Replacement Cat-Back Exhaust System Kit (106-0762)
| Model | Direct-Fit Exhaust System Replacement Kit |
|---|---|
| Manufacturer | BRExhaust |
| Manufacturer Part Number | 106-0762 |
| OEM Part Number | DS7Z-5230-D |
| Exterior | Painted |
This BRExhaust cat-back replacement kit replaces the system from behind the last catalytic converter and is built as a mandrel-bent, multi-piece assembly intended to match factory fit and function. It is typically used as a full-system replacement on 2013–2020 Lincoln MKZ 2.0L applications to restore exhaust flow and sound while keeping emissions components intact. Notable features include corrosion-resistant aluminized steel construction, mandrel bends for smoother flow, and a bolt-on adjustable design that lets installers route sections around axles and brackets without cutting or welding. The kit ships as a single-box solution with clamps, gaskets, fasteners, and installation instructions to simplify DIY or shop installation. Practical benefits are solid corrosion resistance for long-term use, easier fitment on late-model vehicles thanks to the multi-piece layout, and a complete parts set that reduces sourcing time. Limitations are that the kit uses aluminized rather than stainless steel and sound tuning is tied to the supplied configuration rather than customizable tips or mufflers.
Best for: Performance-minded owners seeking a high-quality, factory-replacement cat-back that restores flow and fitment without custom fabrication.
Less Ideal for: Buyers who want maximum corrosion resistance or a custom sound profile should consider stainless or performance-tuned aftermarket systems instead.
- Direct-fit, multi-piece bolt-on design simplifies installation around chassis obstructions
- Mandrel-bent tubing promotes smoother exhaust flow compared with crush-bent sections
- Complete kit includes clamps, gaskets, and hardware so no extra parts are needed
- Aluminized construction offers improved corrosion resistance over plain steel
- Aluminized steel is less corrosion-resistant long term than stainless steel alternatives
Verdict: A complete, mandrel-bent direct-fit cat-back kit that makes replacing the factory exhaust on 2013–2020 Lincoln MKZ 2.0L straightforward while restoring flow and fitment.
3. Flowmaster FlowFX 717887 Cat-Back Exhaust System
| Part Number | 717887 |
|---|---|
| Tip Diameter | 4.50-inch |
| Tubing | 3 in. tubing |
| Construction | Stainless steel |
This Flowmaster FlowFX cat-back replaces the factory rear section with 3-inch tubing, straight-through mufflers, and a large ceramic-coated tip to add a throaty, performance-oriented note to the exhaust. It installs using the vehicle's existing hanger locations, so a competent DIYer or shop can usually swap it in quickly without major modifications. The stainless construction promises corrosion resistance and the straight-through mufflers focus on free flow and sound rather than quietness, so you get clear exterior presence and improved exhaust tone under acceleration. Some owners report noticeable interior drone around certain RPMs and the system leans toward a louder character that can overpower cabin audio during hard acceleration. Fit and included clamps are generally good, but the supplied tip finish and hardware quality have drawn occasional complaints. For a practical optimizer this system balances cost, easier installation, and a robust sound profile, but expect more cabin noise compared with a touring-style muffler.
Best for: A practical optimizer who wants an affordable, no-nonsense performance upgrade that improves exhaust tone and is straightforward to fit and maintain.
Less Ideal for: Drivers seeking a near-stock quiet ride or those who prioritize minimal in-cabin drone should consider a touring or muffler-focused system instead.
- Straight-through muffler design for freer exhaust flow and a louder, aggressive tone
- Uses factory hanger locations for simpler installation
- Full stainless steel construction resists corrosion better than mild steel
- Large 4.5-inch ceramic-coated tip improves appearance and resists discoloration
- Tends to produce interior drone around mid RPMs for some vehicles
- Louder exterior volume can drown out in-cabin audio during acceleration
- Some users reported lower-quality supplied tip and occasional missing pieces
Verdict: A budget-friendly, easy-to-install cat-back that delivers a loud, throaty tone and solid corrosion resistance but may introduce cabin drone and higher interior noise levels.
4. MBRP S5236AL 3" Aluminized Steel Single Side Exit Cat-Back Exhaust System
| Material | Aluminized steel |
|---|---|
| Tip material | Mirror polished T304 |
| System type | Single side exit cat-back |
| Compatibility | Fits Lincoln MKZ (article focus) |
This MBRP cat-back is a value-focused exhaust system intended to replace the factory rear exhaust on a Lincoln MKZ to give the car a richer tone and slight power improvements. It installs as a single side exit cat-back and is designed to be fitted in place of the stock rear piping using common hand tools; owners report straightforward assembly and simple bolt-on fitment when preassembled first. Notable features include heavy sixteen gauge aluminized steel construction and seam protection to resist corrosion better than plain steel, plus mirror-polished T304 tips for a cleaner outlet appearance. In practice the system provides a low, mellow idle rumble and opens up to a fuller note under acceleration without excessive drone, and it can produce small gains in torque and fuel economy. Limitations are typical for an aluminized budget system: it is not stainless steel so long-term corrosion resistance will be less than factory-quality stainless options, and a few buyers have received damaged pieces that required minor repair or adjustment during install.
Best for: Budget-conscious owners looking to add a deeper, sportier exhaust note and modest performance gains to a Lincoln MKZ without paying for premium stainless systems.
Less Ideal for: Drivers who prioritize maximum long-term corrosion resistance or want a fully OEM-level stainless system should consider higher-end stainless options instead.
- Value-oriented construction that mirrors higher-end designs for similar sound and performance improvements
- Sixteen gauge aluminized steel with sealed seams offers better rust resistance than untreated steel
- Mirror-polished T304 tips improve rear appearance
- Designed for bolt-on installation with common hand tools and straightforward preassembly
- Aluminized steel is less corrosion-resistant than stainless steel long term
- Some customers reported receiving damaged parts requiring small repairs before installation
Verdict: A cost-conscious cat-back that brings fuller sound and small performance benefits to a Lincoln MKZ but sacrifices the long-term corrosion resistance of stainless systems.
5. MAC Flex Resonator Dual Rear Muffler Cat-Back Exhaust for Lincoln MKZ 2007–2012 3.5L
| Fits | Lincoln MKZ 2007-2012 3.5L |
|---|---|
| Manufacturer | Mac Auto Parts |
| Brand | MAC |
| Manufacturer Part Number | 219076 |
This MAC cat-back exhaust kit replaces the complete rear section of a Lincoln MKZ 3.5L and includes resonated flex piping, extended section pipes, left and right rear mufflers, chrome stainless tips, clamps, and rubber hangers. It is intended as a direct-fit factory-style replacement for the 2007–2012 MKZ and is used to restore exhaust routing, backpressure and sound when the original system is corroded or damaged. Notable features include preinstalled resonators for reduced drone, a flex pipe with first resonator to absorb movement, and stainless tips for a finished look. The kit is manufactured to meet fit, form and function expectations and arrives with the majority of hangers and clamps needed for installation, though nuts and bolts are not included. Expect a factory-quality fit when installed by a competent DIYer or shop, but plan for basic hardware and potential minor alignment adjustments during installation.
Best for: Reliability-focused Lincoln MKZ owners who prioritize restoring factory performance and sound with a full, factory-style replacement rather than a performance-modified system.
Less Ideal for: Buyers seeking an aggressive performance or custom sound upgrade should consider tuned aftermarket performance systems instead.
- Complete cat-back kit supplied with resonators, mufflers, clamps, tips and hangers for a full replacement
- Includes flex pipe with resonator to reduce vibration and accommodate engine movement
- Manufactured to meet fit, form and function for direct replacement on specified MKZ model years
- Stainless steel chrome-tip mufflers provide corrosion resistance at visible outlets
- Nuts and bolts are not included which may require additional hardware purchases
- Some minor alignment or trimming may be needed for a perfect fit during installation
Verdict: A full, factory-style cat-back replacement kit that restores exhaust function and quiet resonated sound for 2007–2012 Lincoln MKZ 3.5L owners.
6. BRExhaust Direct-Fit Replacement Cat-Back Exhaust System Kit (106-0642)
| Model | Direct-Fit Exhaust System Replacement Kit |
|---|---|
| Manufacturer | BRExhaust |
| Exterior | Painted |
| Item model number | 106-0642 |
This BRExhaust cat-back kit provides a full replacement of the exhaust path from behind or near the rear catalytic converter and is intended as a bolt-on, direct-fit solution for compatible Lincoln MKZ models. The multi-piece, mandrel-bent design lets the installer route pipes around axles and brackets for better fitment on older chassis, while the kit includes clamps, gaskets, nuts, and bolts so no additional parts are required. Constructed from aluminized steel, the system aims to resist corrosion and give durable service without welding or fabrication. Practical benefits include maintaining emissions equipment in place and simplifying DIY installation with the included instructions. Limitations are that this is an aluminized rather than full stainless system and fitment is limited to the specified vehicle years and engine sizes, so buyers must confirm exact application before purchase.
Best for: Risk-averse mainstream buyers who prioritize a straightforward, factory-replacement style repair and want a boxed kit that includes all installation hardware for a stress-free DIY or shop installation.
Less Ideal for: Buyers seeking a long-term stainless performance exhaust or those who need fitment for vehicles outside the specified Lincoln MKZ model years and engine sizes should consider other options.
- Complete kit includes clamps, gaskets, and hardware for a single-box install
- Multi-piece, bolt-on design allows adjustable routing around chassis obstructions
- Mandrel-bent tubing promotes smoother flow and consistent fitment
- Maintains emissions components in place to preserve compliance
- Aluminized steel construction is less corrosion-resistant long-term than stainless steel
- Fitment limited to specified 2006–2012 Ford Fusion and 2007–2012 Lincoln MKZ 3.0L/3.5L applications
Verdict: A complete, bolt-on cat-back replacement kit that simplifies restoring factory-style exhaust fit and function on compatible Lincoln MKZ models.
Choosing the Right Lincoln MKZ Cat-back Exhaust System: Key Factors to Consider
Fitment And Compatibility
Correct fitment is the foundation of a successful cat-back exhaust decision. An exhaust designed specifically for the Lincoln MKZ will align with factory hangers, piping angles, and bumper cutouts, reducing the need for cutting or custom brackets. Poor fitment can cause exhaust leaks, rattles, or premature hanger failure, and can add hours of shop labor. Confirming fitment also affects emissions and sensor placement because misaligned piping may stress oxygen sensor leads or interfere with heat shields. When fitment is reliable, installation tends to be faster and the final result looks and sounds as intended.
Material And Corrosion Resistance
Material choice directly affects durability and long-term appearance. Stainless steel alloys resist rust better than mild steel and typically last longer in wet or salted-road climates. Within stainless options, higher-grade alloys and thicker wall tubing withstand heat cycles and road debris more effectively. Corrosion resistance matters for both pipework and muffler housings since rust can create leaks and change the sound signature over time. Consider welded joints and flange quality as these are common failure points; laser-cut flanges and full-penetration welds usually offer better longevity.
Sound Character And Cabin Resonance
Sound is a primary reason many owners choose a cat-back system, but character matters as much as volume. Look for systems tuned to the type of tone you prefer, whether a deep, mellow note or a louder, sportier edge. Also consider how sound is managed at different engine speeds to avoid intrusive drone during steady cruising. Muffler internal design, pipe diameter, and resonator presence all influence the resulting tone. A system that balances exterior presence with acceptable cabin comfort will be more practical for daily driving.
Pipe Diameter And Flow Characteristics
Pipe diameter affects exhaust velocity and backpressure, which in turn influence low-end torque and high-rpm power delivery. Undersized piping can create unnecessary backpressure while oversized piping may reduce low-rpm responsiveness. The goal is to match diameter and overall flow capacity to the Lincoln MKZ engine characteristics so gains are meaningful without sacrificing drivability. Bends, mandrel bending quality, and smooth transitions also keep flow efficient and reduce turbulence that can negate theoretical gains.
Installation Complexity
Installation complexity determines how much time and effort you will need to install the system and whether professional help is recommended. Systems that reuse factory hangers and bolt directly to the catalytic converter outlet are usually straightforward and can be installed with common hand tools. More involved systems may require cutting, welding, or fabrication and are best left to experienced shops. Also consider hardware quality, included gaskets, and whether detailed instructions or online support are provided to avoid avoidable delays during installation.
Warranty And Support
A clear warranty shows manufacturer confidence and helps protect your investment if corrosion or defects occur. Look for coverage that addresses both materials and workmanship and note the warranty duration and what conditions void coverage. Availability of replacement parts and responsive customer support can simplify repairs or future modifications. Warranties paired with documented corrosion resistance and build quality reduce long-term ownership risk and can offset higher upfront cost for better-made systems.
How We Chose the Best Lincoln MKZ Cat-back Exhaust System
We evaluated candidate systems specifically for the Lincoln MKZ using criteria that reflect the priorities of owners who want reliable fitment and meaningful performance or sound gains. Primary filters included confirmed vehicle fitment and manufacturing tolerances to minimize modifications during installation. Material quality was assessed by pipe construction and corrosion resistance, with preference for thicker wall tubing and proven alloys. Sound profile was rated for character and cabin resonance across driving conditions rather than peak volume alone. Installation complexity was measured by the number of factory connections retained, required tools, and whether adapters or custom cutting were typically needed. Finally, longevity and warranty coverage were factored in to balance short-term gains against long-term ownership costs. We excluded systems that required major chassis or bumper modifications, products without clear fitment information for the Lincoln MKZ, and any options that prioritized extreme noise over drivability.
Our full evaluation process is outlined in our review methodology.
FAQ
Will a cat-back exhaust system affect my Lincoln MKZ's fuel economy?
A cat-back exhaust can change engine breathing, which sometimes leads to small changes in fuel consumption. Often the effect is minor and depends on driving style and the system's flow characteristics. Optimized flow may slightly improve efficiency under some conditions, while more aggressive systems can encourage heavier throttle use and thus increase fuel use.
Can I install a cat-back exhaust on my Lincoln MKZ myself?
Many cat-back systems are designed for bolt-on installation that reuses factory hangers and can be done with common tools. However, difficulty varies by design and your mechanical experience. If cutting, welding, or precise alignment is required, professional installation is recommended to ensure proper fit and prevent leaks.
How loud will a cat-back make my Lincoln MKZ?
Loudness depends on muffler design, pipe diameter, and whether resonators are included. Systems tuned for a sportier sound are generally louder and may produce cabin drone at certain speeds. If you prefer modest gains in tone, choose a system that emphasizes refined character rather than maximum volume.
Is stainless steel always the best choice for a cat-back exhaust?
Stainless steel offers superior corrosion resistance compared with mild steel and often longer service life, especially in humid or salted-road environments. However, stainless variants vary in alloy grade and wall thickness, which influence longevity and cost. Mild steel systems can be acceptable in dry climates but may require more maintenance over time.
Will changing to an aftermarket cat-back affect engine sensors or emissions equipment?
A properly designed cat-back maintains original sensor locations and does not alter catalytic converters, so it typically does not interfere with emissions equipment. Verify that the system preserves oxygen sensor ports and uses compatible flanges. If the new piping requires repositioning sensors or catalysts, additional work may be necessary to remain compliant.
Conclusion
Choosing a cat-back exhaust for your Lincoln MKZ is about balancing sound, durability, and installation practicality. Prioritize systems that offer confirmed fitment and corrosion-resistant materials if you expect long-term use, and match pipe diameter and muffler design to the driving character you want. Remember that louder does not always mean better; consider cabin resonance and daily drivability when selecting a system.Evaluate warranty coverage and installation requirements alongside sound and materials to make a choice that fits both your performance goals and ownership expectations.
Explore More:
- Check out all Lincoln MKZ parts & accessories
- Explore Cat-back Exhaust Systems Maintenance & Repair Guides
- Explore Exhaust & Emissions
- Browse all Auto Parts
