Choosing the best cat-back exhaust system for your Infiniti G37 can significantly enhance its sound, performance, and appearance. The MagnaFlow Performance Exhaust System 16820 stands out for its street-ready tone and durability, making it a top overall choice. Meanwhile, options like the J2 Engineering Stainless Steel System offer a balance of quality and ease of installation, ideal for enthusiasts seeking a straightforward upgrade. The main challenges in this category include balancing sound levels, build quality, and compatibility with your specific G37 model. Continue reading to explore detailed reviews and help narrow down your perfect fit.
Key Takeaways
- The top picks balance sound quality with durability, with stainless steel options leading in longevity.
- Performance gains vary; some systems prioritize aggressive tone while others focus on increased horsepower.
- Ease of installation differs, with some kits designed for DIYers and others requiring professional help.
- Pricing ranges widely; investing more often yields better build quality and sound customization.
- Compatibility considerations are critical to ensure the exhaust fits and functions properly on specific G37 models.
More Details on Our Top Picks
PHILTOP CatBack Exhaust System Replacement for 2009-2013 INFINITI G37 V6 3.7L
This PHILTOP exhaust stands out for its high-quality stainless steel construction, offering excellent corrosion resistance and heat tolerance compared to cheaper alternatives. Its design reduces noise effectively, providing a deeper, sportier tone that appeals to enthusiasts wanting a noticeable sound upgrade. While it fits 2009-2013 G37 models well, some users report installation challenges, especially on earlier models like the 2011 G37x, which may require welding. Compared to the J2 Engineering system, this option offers better corrosion resistance but may lack the performance gains of a true performance system. Overall, it makes the most sense for drivers seeking a reliable, long-lasting upgrade with a sporty sound, provided they are comfortable with some DIY skills.
Pros:- High-quality T-304 stainless steel construction for longevity
- Effective noise reduction with deep, sporty tone
- Corrosion and heat resistant for long-term durability
Cons:- Installation may require welding on some models like the 2011 G37x
- Some users find it challenging to fit without modifications
Best for: G37 owners looking for a durable, corrosion-resistant exhaust with a robust sound that lasts over time.
Not ideal for: Casual drivers or those concerned about perfect fitment without modifications, especially on older or complex models.
- Material:T-304 Stainless Steel
- Pipe Diameter:2.37 inches
- Muffler Dimensions:10.04 x 6.1 inches
- Tail Pipe Diameter:3.5 inches
- Compatibility:2009-2013 G37 V6 3.7L
- Corrosion Resistance:Excellent
Bottom line: This exhaust makes the most sense for owners prioritizing durability and sound, willing to handle minor installation issues.
Axle Back Dual Tip Muffler Delete Exhaust for Infiniti G35 G37 4dr Sedan 2007-2013
This model is tailored for those seeking a more aggressive look with dual chrome tips, offering a high-end appearance compared to standard single-tip systems like MagnaFlow. Designed to increase exhaust flow, it enhances engine breathing and sound, creating a louder, more aggressive exhaust note that appeals to drivers wanting a sporty edge. However, its simpler design and lack of performance tuning mean it doesn’t deliver horsepower gains like the J2 Engineering system. Installation is straightforward for those familiar with exhaust work, but some might find the fit a bit tight or lacking in precision for specific models. Overall, this pick is best suited for owners who want a visual upgrade with a louder, more aggressive exhaust tone but are less concerned with performance gains.
Pros:- Polished stainless steel with dual chrome tips for a high-end look
- Increases exhaust flow for a louder, sportier sound
- Easy bolt-on installation
Cons:- Lacks performance tuning or horsepower improvements
- Potential fitment issues on some models due to simple design
Best for: Owners wanting a visually striking exhaust with a louder, aggressive exhaust tone for their G37 or G35 sedan.
Not ideal for: Performance purists or those expecting significant horsepower gains, as it mainly enhances sound and looks with minimal performance impact.
- Material:Stainless Steel
- Tip Size:4 inches
- Piping Diameter:2.50 inches
- Installation:Bolt-on
- Compatibility:2007-2013 G35 G37 4-Door Sedan
- Finish:Polished
Bottom line: Ideal for owners prioritizing appearance and sound over performance gains, especially those seeking bold visual impact.
J2 Engineering J2-CBE-DS-034 Stainless Steel Cat Back Exhaust System [Compatible with 09-13 Infiniti G37 Sedan 4-Door]
” image=”https://m.media-amazon.com/images/I/61U1gVf17uL._AC_SY300_SX300_QL70_FMwebp_.jpg” link=”0″]Best for Performance Enhancement and Deep Tone
View Latest PriceThis J2 Engineering system is designed with high-quality T-304 stainless steel, featuring computerized mandrel bends that improve exhaust flow and increase horsepower by 15-25 HP, outperforming basic replacements like PHILTOP’s standard systems. Its larger pipes and tuned resonators produce an aggressive but smooth deep exhaust tone, ideal for enthusiasts seeking a performance boost and a commanding sound. Compared with simpler bolt-on systems, this setup offers significant power gains and a noticeable increase in torque. The tradeoff is that installation may require some mechanical skill, and the price reflects its performance-oriented design. Overall, this system is perfect for G37 owners wanting a substantial power increase combined with an aggressive sound profile.
Pros:- Dyno-proven to increase 15-25 HP and torque
- Made of high-quality T-304 stainless steel with CNC mandrel bends
- Deep, aggressive yet smooth exhaust tone
Cons:- Requires more involved installation, possibly welding
- Higher price point compared to basic bolt-on systems
Best for: Performance-focused owners aiming to increase horsepower and torque with a deep, aggressive exhaust note.
Not ideal for: Casual drivers or those seeking a quiet, OEM-like sound, as this system emphasizes performance and sound loudness.
- Material:T-304 Stainless Steel
- Main Pipe Diameter:2.375 inches
- Muffler Diameter:4 inches
- Horsepower Gain:15-25 HP
- Compatibility:2009-2013 G37 Sedan
- Construction:Mandrel-bent, TIG welded
Bottom line: Best suited for owners aiming to boost power and enjoy a deep, sporty exhaust note with a performance-oriented system.
PHILTOP Cat-Back System, Stainless Steel Cat Back Exhaust System Fit for 2009-2013 INFINITI G37 V6 3.7L
This PHILTOP system emphasizes durability with its high-grade stainless steel, promising a longer lifespan than cheaper alternatives. Its design reduces back pressure and improves responsiveness, making it suitable for drivers who want a reliable upgrade that also enhances fuel efficiency. Compared to the J2 Engineering system, it may not offer as much horsepower increase but excels in corrosion resistance and long-term cost savings. Some users report fitment issues on certain models, like the 2011 G37x, which could require minor modifications. This pick is best for owners who want a dependable, rust-resistant exhaust that maintains performance over time, even if it doesn’t deliver maximum horsepower gains.
Pros:- Made of high-grade stainless steel for durability
- Improves engine responsiveness and fuel efficiency
- Reduces back pressure effectively
Cons:- May require modifications for perfect fitment
- Less aggressive sound compared to performance systems
Best for: G37 owners seeking a corrosion-resistant exhaust with reliable long-term performance and efficiency benefits.
Not ideal for: Owners looking for the highest horsepower gains or aggressive sound, as this system focuses more on durability and efficiency.
- Material:Stainless Steel
- Pipe Diameter:2.37 inches
- Muffler Dimensions:10.04 x 6.1 inches
- Weight:Lightweight
- Compatibility:2009-2013 G37 V6 3.7L
- Warranty:2 Years
Bottom line: This system is ideal for owners prioritizing durability and efficiency over maximum horsepower or loud sound.
PHILTOP Exhaust Kit Suitable for 2009-2013 INFINITI G37 V6 3.7L
This PHILTOP exhaust kit offers a practical solution at a lower price point, providing basic exhaust flow improvements with stainless steel durability. It’s a suitable choice for owners wanting a simple upgrade that reduces back pressure and enhances responsiveness without the extra cost of performance systems like J2 Engineering. However, customer reviews highlight that fitment can be inconsistent, with some users experiencing issues, especially on models like the 2011 G37x, which may require welding or minor modifications. Its straightforward installation and rust resistance make it a decent budget pick, but it sacrifices some sound quality and horsepower gains. Overall, this is best for budget-conscious owners who want simple reliability rather than maximum performance.
Pros:- Affordable price point
- Made of durable stainless steel
- Corrosion resistant for long-term use
Cons:- Fitment issues reported on some models
- Limited performance and sound enhancement
Best for: Owners with tight budgets looking for a reliable, rust-resistant exhaust upgrade that improves responsiveness.
Not ideal for: Performance enthusiasts or those wanting a deep, aggressive sound, as this system offers only basic improvements and mixed fitment reports.
- Material:Stainless Steel
- Pipe Diameter:2.37 inches
- Length:11.81 inches
- Tail Pipe Diameter:3.5 inches
- Compatibility:2009-2013 G37 V6 3.7L
- Warranty:2 Years
Bottom line: Best suited for budget-conscious owners needing basic durability and responsiveness, accepting possible fitment issues.
PLESIU Stainless Steel Axle Back Muffler Exhaust for Infiniti G37 2dr Coupe 2008-2013
This option stands out for its polished stainless steel finish and 4-inch double-walled tips, offering a high-end look without the hefty price tag. Compared with more expensive systems like the MagnaFlow Street Series, the PLESIU exhaust emphasizes aesthetic appeal and moderate sound enhancement. Its 2.50-inch OD piping is designed to improve exhaust flow, helping your engine breathe better, which can translate into slight performance gains. However, this model is only compatible with coupe models, and the loudness level might be more aggressive than some prefer, especially at cold starts. It’s an excellent choice for G37 owners seeking a stylish, noticeable exhaust upgrade on a budget, but those with sedans or seeking a quieter experience should look elsewhere.
Pros:- High-quality stainless steel construction with polished finish for durability and aesthetics
- 4-inch double-walled tips provide a premium, aggressive look
- Designed to improve exhaust flow and engine breathing
Cons:- Louder than many owners might expect, especially during cold starts
- Limited to coupe models, making it incompatible with sedans
Best for: G37 coupe owners looking for a visually appealing, budget-friendly exhaust upgrade that enhances sound and style.
Not ideal for: Sedan owners or those preferring a quieter, more subdued exhaust note, as this system runs louder and is coupe-specific.
- Material Type:Stainless Steel
- Shape:Round
- Tips Diameter:4 Inches
- Piping Diameter:2.50 Inches
- Flange Thickness:3/8 Inch
- Compatibility:2008-2013 Infiniti G37 Coupe
Bottom line: This pick makes the most sense for coupe owners wanting an affordable, stylish, and attention-grabbing exhaust upgrade.
MagnaFlow Performance Exhaust System 16820: Cat-Back, Street Series
This system makes the list for producing MagnaFlow’s signature deep, resonant sound and its extensive dyno testing backing performance claims. Compared to the PLESIU system, the MagnaFlow Street Series prioritizes improved engine power and flow dynamics, which can be felt through more responsive acceleration and smoother operation. Crafted from durable stainless steel with CNC robotic manufacturing, it guarantees long-term reliability. Its OEM-like fitment, verified through 3D scanning, simplifies installation and helps ensure proper sealing. However, the system’s sound level and tone are more aggressive and throaty, which might be too loud for owners seeking a more subtle note. Its high-quality construction and proven performance make it especially suitable for drivers who want a reliable upgrade that enhances both sound and horsepower, but it may be overkill for casual or noise-sensitive owners.
Pros:- Iconic MagnaFlow deep, throaty sound for a sporty driving experience
- Dyno-proven performance gains with improved exhaust flow
- Robust stainless steel construction with precision robotic manufacturing
- OEM-like fitment for straightforward installation
Cons:- Louder exhaust tone may be too aggressive for some drivers
- Higher price point compared to basic systems like PLESIU
Best for: Performance-focused G37 owners seeking a proven, dyno-tested exhaust system with deep, aggressive sound and increased horsepower.
Not ideal for: Owners who prioritize a quiet ride or are on a tight budget, as MagnaFlow systems tend to be pricier and louder than basic replacements.
- Material Type:Stainless Steel
- Shape:Round
- System Type:Cat-Back
- Fitment:2009-2009 Infiniti G37 V6 3.7L
- Warranty:Limited Lifetime
- Manufacturing:Made in the USA
Bottom line: This system is ideal for enthusiasts wanting a durable, performance-enhancing exhaust with MagnaFlow’s legendary sound and quality.
How We Picked
Our evaluation focused on key factors that influence a buyer’s decision, including performance improvements, build quality, sound profile, ease of installation, and value. We prioritized products that are compatible with the 2009-2013 Infiniti G37 and considered user feedback, durability, and material quality. The ranking reflects a balance between affordability and high-end performance features, with premium options rated for those seeking the best possible experience. Products were selected to cater to different priorities — whether sound, performance, or budget — ensuring a well-rounded lineup for diverse buyers.Factors to Consider When Choosing Best Cat-back Exhaust Systems For Infiniti G37
Selecting the right cat-back exhaust system involves understanding several critical factors beyond just sound and price. Your choice should align with your driving style, desired sound level, and long-term durability. Considering installation complexity and material quality can prevent costly mistakes. This guide walks through important considerations to help you make an informed decision that matches your needs and expectations.Performance Gains and Sound Profile
Some systems are designed primarily to boost horsepower and torque, often with less emphasis on sound. Others aim for a loud, aggressive tone that enhances the sporty feel of your G37. It’s important to match your preference—whether you want a subtle upgrade or a roar on startup. Keep in mind that louder exhausts may attract more attention and could be less suitable for daily commuting if noise levels are a concern.
Material and Durability
Stainless steel is the gold standard for longevity, resisting rust and corrosion in various climates. Cheaper options may use aluminized steel, which can deteriorate faster over time. Investing in high-quality material often pays off through sustained performance and appearance. If you live in an area with heavy road salt or moisture, opting for stainless steel is a wise decision to avoid premature replacement.
Ease of Installation
Some exhaust systems are straightforward bolt-on upgrades suitable for DIY installation, saving money on labor costs. Others may require cutting or welding, best handled by professionals. Consider your mechanical skills and whether you have access to the necessary tools. A well-designed, direct-fit system can drastically reduce installation time and frustration.
Price and Value
Higher-priced systems often feature superior materials, refined sound profiles, and performance enhancements. However, a more affordable option might still deliver noticeable benefits if you’re new to modding or on a budget. Balance your expectations with your budget—sometimes, paying a little more ensures longer-lasting quality and a more satisfying overall experience.
Compatibility and Fitment
Ensuring the system fits your specific G37 model and body style (coupe or sedan) is crucial. Some kits are universal or fit multiple years, but slight differences can affect fitment and performance. Always verify compatibility before purchase and consider whether additional modifications are needed. Proper fitment guarantees optimal sound, flow, and durability without unnecessary hassle.
Frequently Asked Questions
Will upgrading my exhaust system improve my G37’s horsepower?
Upgrading to a cat-back exhaust can provide a modest increase in horsepower and torque by improving exhaust flow and reducing backpressure. The actual gains depend on the specific system and how well it complements your engine’s tuning. For significant performance improvements, pairing the exhaust with an ECU tune or other modifications can maximize results. Keep in mind, the primary benefit of these upgrades often lies in sound and appearance, with performance gains being secondary.
How loud will my G37 sound with these exhaust systems?
The sound level varies depending on the design and materials used. Many systems are designed to produce a deeper, more aggressive tone without being excessively loud, but some, especially those with straight-through mufflers or larger tips, can be quite loud at full throttle. Consider your daily driving environment—if you need a quieter ride for commuting, opt for systems with sound dampening features. Conversely, if you want a noticeable growl, select a system marketed for aggressive sound.
Are stainless steel exhaust systems worth the extra cost?
Stainless steel exhausts are generally more durable and resistant to rust, making them a smart investment for long-term performance and appearance. While they cost more upfront, they often last longer and maintain their look better over time, especially in harsh climates. If you plan to keep your G37 for years or live in an area with corrosive elements, choosing stainless steel provides better value over the vehicle’s lifespan.
Can I install a cat-back exhaust system myself?
Many bolt-on systems are designed for DIY installation, requiring basic hand tools and mechanical skills. However, some setups may involve cutting or welding, which is best handled by a professional. Before starting, review detailed installation instructions and consider your comfort level with mechanical work. A proper fitment not only ensures optimal performance but also prevents potential damage or leaks.
Should I prioritize sound or performance when choosing an exhaust system?
This depends on your personal driving style and priorities. If you want a deep, sporty sound and don’t mind increased noise, focus on systems designed for sound enhancement. If performance and efficiency are more important, look for systems that improve flow and horsepower, even if they produce a subtler tone. Many options strike a balance, so consider whether your main goal is to sound aggressive or to gain a measurable performance boost.
Conclusion
For those seeking the best overall upgrade, the MagnaFlow Performance Exhaust System offers a balanced mix of sound, durability, and performance. Budget-conscious buyers should consider the PHILTOP Stainless Steel Kit for reliable quality at a lower cost. If you want a premium, race-inspired sound with top-tier materials, the PLESIU Stainless Steel Axle Back is worth the investment. Beginners or casual enthusiasts will benefit from systems that are easy to install, while performance-focused drivers should prioritize systems optimized for flow and horsepower. Your choice ultimately hinges on your specific goals and driving habits.
