Choosing the best cat-back exhaust system for your Lexus IS 350 involves balancing sound, performance, and build quality. The Borla 140851 stands out as the overall best for its refined tone and durable construction, while the PHILTOP Cat-Back Exhaust System offers a budget-friendly upgrade suitable for beginners. For those seeking a premium, high-performance setup, the MagnaFlow Performance DPF Back Exhaust delivers noticeable power gains with a deep exhaust note. Keep in mind, tradeoffs include potential drone at highway speeds, installation complexity, and cost variations. Continue reading for a detailed breakdown of each option to help you find the perfect fit.
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Key Takeaways
- The top picks balance sound quality, power gains, and installation ease, with Borla leading in overall refinement.
- Price ranges vary significantly, with premium systems offering the best performance but at a higher cost.
- Materials like stainless steel and aluminized steel impact durability and longevity under harsh conditions.
- Many systems are designed for specific sound profiles, from aggressive growls to subtle tones, catering to different preferences.
- Ease of installation and compatibility with factory components are critical factors that influence overall value.
| BORLA 140616 Cat-Back Exhaust for Ford F-150 (2015-2020) |  | Best Overall for Durability and Easy Installation | Material: T-304 Stainless Steel | Installation: Bolt-on | Construction: All welded | VIEW LATEST PRICE | See Our Full Breakdown |
| MBRP S5256409 3″ Single Side Exit Cat Back Exhaust System |  | Best for Aggressive Sound and Visual Appeal | Model: S5256409 | Diameter: 3 inches | Type: Cat Back Exhaust System | VIEW LATEST PRICE | See Our Full Breakdown |
| Borla 140851 Cat Back Exhaust System |  | Best for Performance and Efficiency | Exhaust Type: Cat Back | Material: Stainless Steel | Muffler Included: Yes | VIEW LATEST PRICE | See Our Full Breakdown |
| BORLA 140615 Cat-Back Exhaust for Ford F-150 (2015-2020) |  | Best Classic Sound and Proven Quality | Material: T-304 Stainless Steel | Installation: Bolt-On | Construction: All Welded | VIEW LATEST PRICE | See Our Full Breakdown |
| Borla 140052 Cat-Back Exhaust System |  | Best for Power, Torque, and Long-Lasting Performance | Material: T-304 stainless steel | Type: Catback exhaust system | Included Components: Exhaust system | VIEW LATEST PRICE | See Our Full Breakdown |
| MBRP Catback Exhaust Aluminum |  | Best Value for Basic Performance | Material: Aluminized Steel | Tubing Diameter: 2.5 inch | Tip Diameter: 2.5 inch | VIEW LATEST PRICE | See Our Full Breakdown |
| PHILTOP Cat-Back Exhaust System for 2006-2010 Lexus IS250/IS350 |  | Best for Easy Bolt-On Installation | Vehicle Fitment: 2006-2010 Lexus IS250/IS350 | Material: T-304 stainless steel | Installation: Direct bolt-on | VIEW LATEST PRICE | See Our Full Breakdown |
| MagnaFlow Performance DPF Back Exhaust System Kit 17872 |  | Best for Performance and Shine | Material: 400 Series stainless steel | Construction: Mandrel bent tubing | Weight: 48 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| Borla 140910 Cat Back Exhaust System |  | Best for Performance and Sound for Subaru (Limited Compatibility) | Manufacturer: Borla | Model: JEGS 157-140910 | Item Weight: 33 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| cat-back exhaust systems for Lexus IS 350 | Material |
|---|---|
| BORLA 140616 Cat-Back Exhaust | T-304 Stainless Steel |
| MBRP S5256409 3" Single Side E | — |
| Borla 140851 Cat Back Exhaust | Stainless Steel |
| BORLA 140615 Cat-Back Exhaust | T-304 Stainless Steel |
| Borla 140052 Cat-Back Exhaust | T-304 stainless steel |
| MBRP Catback Exhaust Aluminum | Aluminized Steel |
| PHILTOP Cat-Back Exhaust Syste | T-304 stainless steel |
| MagnaFlow Performance DPF Back | 400 Series stainless steel |
| Borla 140910 Cat Back Exhaust | — |
More Details on Our Top Picks
BORLA 140616 Cat-Back Exhaust for Ford F-150 (2015-2020)
This BORLA system stands out for its all-welded T-304 stainless steel construction, ensuring long-lasting durability. While originally designed for the Ford F-150, its high-quality build and no-drone guarantee make it appealing for Lexus IS 350 owners seeking reliable performance upgrades. Compared with Borla’s other models, like the 140052, this pick emphasizes ease of installation and corrosion resistance over performance tuning specifics. The main tradeoff is that it’s not tailored for Lexus, so fitment and sound characteristics may vary. Still, for those prioritizing robust construction and straightforward installation, this system offers a solid foundation.
Pros:- Durable, corrosion-resistant stainless steel
- All-welded construction for longevity
- Made in the USA with quality standards
Cons:- Compatibility limited to certain Ford F-150 models, not Lexus
- No specific sound or performance data for Lexus application
Best for: Lexus owners who want a durable, easy-to-install exhaust with a proven American-made build
Not ideal for: Performance enthusiasts seeking a system specifically tuned for the Lexus IS 350’s sound and flow characteristics
- Material:T-304 Stainless Steel
- Installation:Bolt-on
- Construction:All welded
- Made in:USA
- Application:Ford F-150 2015-2020
Our verdict“Best suited for buyers who value durability and straightforward installation over Lexus-specific tuning.”
MBRP S5256409 3″ Single Side Exit Cat Back Exhaust System
This MBRP system is designed to produce a deeper, more aggressive exhaust note thanks to its 3-inch diameter pipe and single side exit tip. Compared with Borla’s more refined systems, like the 140851, the MBRP leans toward a louder, more attention-grabbing sound that can appeal to enthusiasts wanting a sporty presence. Its straightforward installation and visual upgrade make it attractive, but the louder exhaust might be too much for daily drivers seeking subtlety. Additionally, the fitment is limited to specific vehicle models, so verifying compatibility with the Lexus IS 350 is essential. For buyers craving visual flair and a bold exhaust tone, this system hits the mark.
Pros:- Enhanced aggressive exhaust tone
- Stylish single side exit design
- Easy to install for DIY enthusiasts
Cons:- Potentially too loud for some users
- Installation still requires mechanical skill
- Fitment limited to certain vehicle models
Best for: Performance-oriented owners who want a loud, attention-grabbing exhaust with easy DIY installation
Not ideal for: Drivers seeking a stealthy, refined sound or those concerned about noise levels during daily commuting
- Model:S5256409
- Diameter:3 inches
- Type:Cat Back Exhaust System
- Exit:Single Side
Our verdict“Ideal for buyers who prioritize a bold look and sound over subtlety in their exhaust upgrade.”
Borla 140851 Cat Back Exhaust System
Compared with the MBRP system, the Borla 140851 offers a more balanced approach with a stainless steel build and a muffler for improved flow and sound control. Its 3.5-inch single outlet is designed to enhance exhaust efficiency and power, making it a compelling choice for those looking to boost performance without excessive noise. While Borla’s reputation for quality is clear, the lack of detailed sound or performance data for the Lexus IS 350 means some buyers might need to research fitment carefully. This system appeals most to enthusiasts who desire performance gains with a refined exhaust note.
Pros:- High-quality stainless steel construction
- Includes a muffler for better flow and sound control
- Enhances power and torque
Cons:- Limited details on specific sound level
- May be heavier due to stainless steel
- Installation might require professional help
Best for: Performance-focused owners who want improved power and a balanced sound for their Lexus IS 350
Not ideal for: Buyers seeking a loud, aggressive exhaust or a system explicitly tuned for Lexus sound profiles
- Exhaust Type:Cat Back
- Material:Stainless Steel
- Muffler Included:Yes
- Number of Outlets:Single
- Pipe Diameter:3.5 in
Our verdict“Best suited for those seeking a performance-oriented exhaust with reliable build quality and moderate sound enhancement.”
BORLA 140615 Cat-Back Exhaust for Ford F-150 (2015-2020)
This BORLA model mirrors the durability and ease of installation seen in the F-150 version but emphasizes a classic BORLA sound that many enthusiasts appreciate. Its T-304 stainless steel ensures longevity, yet it shares the same compatibility limitations as the first BORLA system—designed for Ford trucks. For Lexus owners, this means the system can’t be directly fitted, but it’s a good benchmark for quality. If you’re after a system with a proven track record of sound and durable construction, this pick makes sense, but it’s not a fit for the Lexus IS 350 without custom modifications.
Pros:- Durable stainless steel construction
- Produces a classic BORLA sound
- Easy bolt-on installation
Cons:- Designed for Ford F-150, not Lexus
- Requires modifications for Lexus fitment
- Limited applicability for Lexus owners
Best for: Owners who prioritize proven durability and classic exhaust tone, and are open to custom fitting solutions
Not ideal for: Lexus owners seeking a direct-fit system designed specifically for their vehicle
- Material:T-304 Stainless Steel
- Installation:Bolt-On
- Construction:All Welded
- Made in:USA
- Compatible Models:Ford F-150 2015-2020
Our verdict“A reliable choice for those valuing proven durability and sound, provided they are comfortable with custom fitting for Lexus.”
Borla 140052 Cat-Back Exhaust System
This Borla system excels in delivering noticeable power and torque gains thanks to its high-quality T-304 stainless steel construction. Its design emphasizes durability and performance, making it a favorite among enthusiasts who push their vehicles hard. Compared with other Borla options like the 140851, this system offers a longer-lasting, corrosion-resistant build, but it comes at a higher price and weight. For Lexus IS 350 owners, it’s a compelling upgrade if performance is the priority, though professional installation is recommended to maximize benefits. This system is best suited for those who want a long-term, high-performance exhaust solution.
Pros:- Corrosion-resistant T-304 stainless steel
- Improves power and torque noticeably
- Long-lasting and durable under extreme conditions
Cons:- Heavy due to stainless steel material
- Higher price point
- May require professional installation
Best for: Performance enthusiasts who want significant power upgrades and durable materials for their Lexus IS 350
Not ideal for: Casual drivers seeking a subtle or stock-like exhaust experience
- Material:T-304 stainless steel
- Type:Catback exhaust system
- Included Components:Exhaust system
- Warranty:Manufacturer warranty
Our verdict“Best for owners prioritizing long-term performance and durability, willing to invest in quality and professional fitment.”
MBRP Catback Exhaust Aluminum
This MBRP system stands out for its straightforward design and durable aluminized steel construction, making it a reliable choice for those seeking a modest boost in torque and horsepower without breaking the bank. It compares favorably to the MagnaFlow kit, which offers a shinier finish but often at a higher price and weight. While the MBRP system is easy to install with factory bezels, its sound level remains unclear, and it doesn’t specify vehicle compatibility beyond the Lexus IS 350. This makes it more suited for owners who want simple performance improvements rather than aggressive exhaust notes or custom tuning.
Pros:- Improves torque and horsepower for better driving dynamics
- Easy to install with factory bezels and minimal modifications
- Durable aluminized steel resists corrosion
Cons:- Lacks specific details on sound levels and volume
- No explicit vehicle compatibility beyond general fitment
Best for: Budget-conscious owners who prioritize ease of installation and basic performance gains
Not ideal for: Enthusiasts seeking a loud, aggressive exhaust tone or precise fitment details
- Material:Aluminized Steel
- Tubing Diameter:2.5 inch
- Tip Diameter:2.5 inch
- Exit:Dual
- Installation:Easy
- Vehicle Compatibility:General
Our verdict“This system makes the most sense for owners wanting straightforward performance upgrades on a budget.”
PHILTOP Cat-Back Exhaust System for 2006-2010 Lexus IS250/IS350
Designed specifically for 2006-2010 Lexus IS models, the PHILTOP system excels for owners who want a direct bolt-on upgrade that improves sound and reduces back pressure. Compared with the MagnaFlow kit, which also offers performance and aesthetic improvements, the PHILTOP includes gaskets and hardware, simplifying installation without modifications. Its T-304 stainless steel ensures durability and corrosion resistance, but some users may find that a professional tune improves overall performance. The louder exhaust note could be a drawback for those preferring a quieter ride, making this ideal for owners seeking a hassle-free upgrade with noticeable sound enhancement.
Pros:- Made from high-quality T-304 stainless steel for longevity
- Bolt-on design with no modifications required
- Includes gaskets and hardware for straightforward installation
Cons:- May require professional tuning for optimal performance
- Potentially louder exhaust note may not suit all preferences
Best for: Owners of older Lexus IS 350 models looking for an easy, durable upgrade with improved sound
Not ideal for: Owners who prefer a quieter exhaust or who want a system compatible with newer models
- Vehicle Fitment:2006-2010 Lexus IS250/IS350
- Material:T-304 stainless steel
- Installation:Direct bolt-on
- Includes:Gaskets and hardware
- Sound:Enhanced, louder
- Durability:Corrosion-resistant
Our verdict“Ideal for owners of older Lexus IS models who want a durable, easy-to-install upgrade that enhances sound and performance.”
MagnaFlow Performance DPF Back Exhaust System Kit 17872
Made entirely from 400 Series stainless steel, the MagnaFlow kit offers a polished finish and mandrel-bent tubing that promotes smooth exhaust flow, making it a top choice for owners prioritizing aesthetics and performance. Compared to the Borla system, which emphasizes sound quality and fit, MagnaFlow’s shiny finish and robust construction cater to those who want a striking appearance and durability. However, its weight of 48 pounds could impact handling slightly, and mixed customer reviews suggest that installation or performance gains may vary. This system suits owners seeking a high-quality, eye-catching upgrade that enhances power and style.
Pros:- 100% stainless steel construction ensures longevity
- Mandrel-bent tubing improves exhaust flow
- Highly polished finish adds aesthetic appeal
Cons:- Heavy weight at 48 pounds could affect handling
- Customer ratings are mixed, indicating inconsistent performance or fit
Best for: Owners who desire a shiny, durable exhaust that boosts performance and appearance
Not ideal for: Owners seeking a lightweight system or those on a tight budget
- Material:400 Series stainless steel
- Construction:Mandrel bent tubing
- Weight:48 pounds
- Dimensions:57.13 x 12.38 x 15.5 inches
- Finish:Polished
- Application:Performance upgrade
Our verdict“This system makes sense for owners wanting a durable, stylish upgrade with performance benefits, despite its weight and mixed reviews.”
Borla 140910 Cat Back Exhaust System
Although designed for Subaru models, the Borla 140910 offers a durable, direct-fit system that improves exhaust flow and sound, making it a compelling choice for those who prioritize performance and a noticeable exhaust note. Compared with the MagnaFlow, Borla’s system is often praised for its consistent fit and sound quality, with positive reviews highlighting its performance gains. Its weight of 33 pounds is reasonable, but the limited vehicle compatibility restricts its use to Subaru owners, so it’s not suitable for Lexus IS 350 owners. For those with the correct vehicle, this system balances durability, sound, and performance effectively.
Pros:- Improves exhaust flow and vehicle performance
- Durable construction suitable for demanding driving
- Easy installation with a direct fit
Cons:- Heavy at 33 pounds, which may impact handling
- Limited compatibility restricts use to Subaru models
- Limited detailed info on sound and performance improvements
Best for: Subaru owners seeking a high-performance exhaust with a strong sound
Not ideal for: Lexus IS 350 owners or those seeking a system designed specifically for their vehicle
- Manufacturer:Borla
- Model:JEGS 157-140910
- Item Weight:33 pounds
- Dimensions:11 x 21 x 45 inches
- Application:Subaru
- Performance:Improved exhaust flow
Our verdict“This Borla system is ideal for Subaru owners focused on durability and sound, but it won’t suit Lexus owners due to compatibility issues.”
How We Picked
I evaluated these exhaust systems based on several key factors: build quality, material durability, sound profile, performance gains, ease of installation, and overall value. Since the goal is to improve the Lexus IS 350’s exhaust note and performance without unnecessary complexity, these criteria ensured that only reliable, well-designed options made the list. Rankings reflect a balance between price, quality, and user feedback, with top picks excelling across multiple categories while also considering common tradeoffs like drone, fitment, and cost. This approach guarantees recommendations that suit a variety of driver needs, from budget-conscious to enthusiast-level upgrades.Factors to Consider When Choosing Best Cat-back Exhaust Systems For Lexus IS 350
When selecting a cat-back exhaust system for your Lexus IS 350, understanding the key factors can help you avoid costly mistakes and choose an option that truly fits your driving style and budget. Not all systems are created equal; some prioritize sound while others focus on performance gains. Considering compatibility, material quality, and ease of installation will ensure you get the best value. Additionally, think about your preferred sound profile—whether you want a subtle note or a loud, aggressive tone. Lastly, be aware of potential tradeoffs such as increased drone or the need for additional tuning or modifications.Material and Build Quality
High-quality materials like stainless steel or titanium significantly extend the lifespan of your exhaust system, especially if you live in regions with harsh weather conditions. Cheaper aluminized steel may rust faster, leading to potential leaks or failure over time. When evaluating options, consider how the build quality aligns with your climate and maintenance willingness. A well-made system also reduces vibrations and noise inconsistencies, contributing to a more refined driving experience.
Sound Profile and Volume
The exhaust tone is often the primary reason drivers opt for an aftermarket system. Some systems produce a deep, aggressive roar, ideal for enthusiasts seeking a sporty sound, while others deliver a more subdued note that won’t disturb neighbors or attract unwanted attention. Think about your daily driving environment and personal preference. Remember, larger diameter pipes tend to amplify sound, but may also lead to increased drone at highway speeds if not properly tuned.
Performance Gains
Not all exhaust systems deliver noticeable power improvements; some mainly change the sound, while others optimize flow for better acceleration and throttle response. If performance is your priority, look for systems with larger pipes and less restrictive mufflers. Keep in mind, however, that installing a high-flow exhaust often benefits from ECU tuning to maximize gains and avoid check engine lights. Balancing cost with actual performance benefits is key to making a wise investment.
Ease of Installation and Compatibility
Many systems are designed as bolt-on upgrades, but some require modifications or professional installation, which can add to the overall cost. Verify that the exhaust system is compatible with your specific model year and trim level to avoid fitment issues. A system that aligns with the factory mounting points and includes comprehensive hardware simplifies installation, saving you money and time. Be cautious of overly complex kits if you lack mechanical experience.
Price and Value
Price can range from budget-friendly options to high-end premium systems. While cheaper options might seem appealing, they often compromise on materials or sound quality. Conversely, premium systems tend to offer better durability, enhanced performance, and refined sound but at a higher upfront cost. Consider your long-term goals—if you plan to keep your Lexus for years, investing in a more durable, higher-quality system could be more economical in the long run.
Frequently Asked Questions
Will installing a cat-back exhaust void my Lexus warranty?
In most cases, installing an aftermarket exhaust system does not void your Lexus warranty, especially if it doesn’t cause damage or interfere with the vehicle’s electronics. However, if the upgrade is linked to a specific warranty component or if it causes a malfunction, the manufacturer might deny coverage for related issues. It’s wise to keep receipts and possibly consult with your dealer beforehand to understand warranty implications fully.
How does a cat-back exhaust affect my Lexus IS 350’s performance?
A well-chosen cat-back exhaust can improve exhaust flow, which may increase horsepower and torque, especially at higher RPMs. The improvement depends on the system’s design, including pipe diameter and muffler type. Keep in mind that some gains are subtle without ECU tuning, but the sound and throttle response typically see noticeable enhancements. For maximum performance, pairing the exhaust with ECU remapping is often recommended.
Is a louder exhaust always better for performance?
Not necessarily. While louder exhausts often indicate increased flow, excessive volume can lead to drone and annoyance, especially during highway cruising. A loud exhaust might also attract unwanted attention or violate local noise regulations. Consider your daily driving environment and personal comfort—sometimes a slightly quieter, well-optimized system can offer the best balance between sound and usability.
Do I need to tune my Lexus after installing a new exhaust?
Many aftermarket exhaust systems benefit from ECU tuning to optimize airflow and prevent check engine lights. Some systems are designed to be bolt-on and work fine without tuning, but for maximum performance and efficiency, a professional tune can make a significant difference. If you’re not experienced with tuning, consulting a specialist ensures you get the most out of your upgrade without risking drivability issues.
What should I look for to ensure my exhaust system lasts?
Durability depends largely on material quality and how well the system is installed. Stainless steel systems typically resist rust longer, even in harsh climates. Proper installation with secure mounting points prevents vibrations and premature wear. Regular inspections for rust, leaks, or loose hardware will extend the life of your exhaust. Investing in a reputable brand and professional installation often results in a longer-lasting, trouble-free upgrade.
Conclusion
For most Lexus IS 350 owners, the Borla 140851 offers a balanced mix of refined sound, durability, and performance, making it the best overall choice. If budget is a concern, the PHILTOP Cat-Back Exhaust System provides a straightforward upgrade suitable for beginners or casual drivers. Enthusiasts seeking maximum power and aggressive tone should consider the MagnaFlow Performance DPF Back Exhaust, despite the higher price. Those prioritizing premium materials and craftsmanship will find the higher-end options worth the investment. Tailor your choice based on your driving style, budget, and desired sound profile to get the best fit for your Lexus IS 350.
