Choosing the best cat-back exhaust system for your Infiniti G37 involves balancing performance, sound, and build quality. The MagnaFlow Performance Cat-Back Exhaust System stands out for its refined tone and durability, making it a top overall pick. Meanwhile, the Invidia Gemini Titanium Exhaust offers a lightweight, aggressive sound for enthusiasts seeking a sporty upgrade. The main tradeoffs include sound levels versus comfort and ease of installation. Continue reading for a detailed breakdown of these options and more to find the perfect fit for your G37.
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Key Takeaways
- Top-ranked exhausts balance sound enhancement with durability, with stainless steel being a common material for longevity.
- Titanium tips and lightweight designs are favored by enthusiasts seeking performance boosts without adding weight.
- Direct-fit systems simplify installation, but some kits offer more customization for tuning sound and flow.
- Price often correlates with build quality and sound profile; premium options tend to deliver more refined tones.
- Compatibility varies; choosing an exhaust designed specifically for G37 ensures better fitment and performance.
| Exhaust Resonator Assembly for Infiniti G35 and G37 – Stainless Steel, Direct-Fit Replacement |  | Best Budget-Friendly Replacement | Compatible Models: Infiniti G35 2007-2008 3.5L, Infiniti G37 2009-2013 3.7L | Material: Stainless Steel | Installation: Direct-Fit, no welding required | VIEW LATEST PRICE | See Our Full Breakdown |
| Truck Exhaust Kits – Direct Fit Infiniti G35/G37 07-14 High Flow Axle Back |  | Best for Performance Gains and Easy Installation | Application: Infiniti G35/G37 2007-2014 | Type: High Flow Axle Back | Fitment: Direct Fit | VIEW LATEST PRICE | See Our Full Breakdown |
| MagnaFlow Performance Cat-Back Exhaust System Kit 19637 |  | Best for Power and Aggressive Sound | Material: 409 stainless steel | Type: Cat-Back Exhaust System | Fitment: Verify compatibility before purchase | VIEW LATEST PRICE | See Our Full Breakdown |
| Invidia Gemini Cat-Back Exhaust System with Titanium Rolled Tip for Nissan G37 Coupe |  | Best Premium Upgrade with Style | Application: Nissan G37 Coupe (2007+) | Piping Diameter: 60 mm | Tip Size: 110 mm | VIEW LATEST PRICE | See Our Full Breakdown |
| PLESIU Stainless Steel Axle Back Muffler Exhaust for Infiniti G37 2008-2013 |  | Best for Style and Flow Enhancement | Material: Stainless Steel | Tips: 4-inch Double Walled | Piping Diameter: 2.50 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| 409 Stainless Steel Exhaust Resonator Muffler System Kit Compatible with 2007-2008 G35 3.5L V6 & 2009-2013 G37 3.7L V6 |  | Best Value for Durable OEM-Style Replacement | Material: Stainless steel 409 grade | Compatible vehicles: 2007-2008 G35 3.5L V6, 2009-2013 G37 3.7L V6 | OE Replacement: 603157, 603156, 425467 | VIEW LATEST PRICE | See Our Full Breakdown |
| Northeastern Exhaust Stainless Steel Front Y-Pipe, Resonator, and Mufflers Exhaust System Kit for Infiniti M37 2011-2013 3.7L |  | Best for Performance-Driven M37 Owners | Material: Stainless Steel 409 Grade | Compatibility: Infiniti M37 2011-2013 3.7L | Includes: Y-Pipe, Resonator, Mufflers, Gaskets, Clamps | VIEW LATEST PRICE | See Our Full Breakdown |
| cat-back exhaust systems for Infiniti G37 | Material |
|---|---|
| Exhaust Resonator Assembly for | Stainless Steel |
| Truck Exhaust Kits | Mandrel Bent |
| MagnaFlow Performance Cat-Back | 409 stainless steel |
| Invidia Gemini Cat-Back Exhaus | Titanium |
| PLESIU Stainless Steel Axle Ba | Stainless Steel |
| 409 Stainless Steel Exhaust Re | Stainless steel 409 grade |
| Northeastern Exhaust Stainless | Stainless Steel 409 Grade |
More Details on Our Top Picks
Exhaust Resonator Assembly for Infiniti G35 and G37 – Stainless Steel, Direct-Fit Replacement
This resonator assembly stands out for its straightforward, direct-fit design that requires no welding, making it an accessible upgrade for DIY enthusiasts. Compared to the PLESIU axle back, it doesn’t alter sound as dramatically but offers a noticeable boost in exhaust flow, which can improve overall engine performance. Its stainless steel construction ensures durability, and the included hardware simplifies installation. However, its warranty does not cover shipping or labor, and professional help might be needed for a perfect fit, especially if the original parts are heavily corroded. This makes it a sensible choice for G37 owners seeking a reliable, cost-effective fix without extensive modifications.
Pros:- Easy to install without welding or special tools
- Made of durable stainless steel for longevity
- Includes hardware for hassle-free installation
- Improves exhaust flow and engine performance
Cons:- Warranty does not cover shipping or labor costs
- Installation may require professional help
Best for: G37 owners who want a durable, easy-to-install replacement without breaking the bank.
Not ideal for: Performance enthusiasts seeking a loud, aggressive sound or those wanting a full exhaust system upgrade.
- Compatible Models:Infiniti G35 2007-2008 3.5L, Infiniti G37 2009-2013 3.7L
- Material:Stainless Steel
- Installation:Direct-Fit, no welding required
- Warranty:Lifetime replacement against manufacturing defects
- Includes:Gasket and Clamps
Our verdict“This resonator assembly makes the most sense for G37 owners looking for a straightforward, budget-friendly replacement that enhances exhaust flow.”
Truck Exhaust Kits – Direct Fit Infiniti G35/G37 07-14 High Flow Axle Back
This high-flow axle back exhaust kit is designed to deliver noticeable performance improvements with mandrel-bent pipes optimized for increased airflow, making it a solid upgrade over stock systems. Compared with the MagnaFlow kit, it offers a more straightforward, direct-fit installation with less complexity, though it lacks detailed sound or performance specifications, which could leave some buyers uncertain about the exact gains. Crafted in the USA, it emphasizes quality and craftsmanship, but its limited application range means it won’t suit all G37 models or owners looking for a complete system. This pick is ideal for G35 or G37 owners wanting a simple bolt-on upgrade that enhances exhaust flow without extensive modifications.
Pros:- High-flow mandrel-bent pipes for improved performance
- Direct fit for hassle-free installation
- Made in the USA with quality craftsmanship
- Enhances exhaust flow and engine breathing
Cons:- Limited to specific model years and configurations
- Lacks detailed sound or power output data
Best for: Drivers who want an easy-to-install performance boost on their G35 or G37 without a full system overhaul.
Not ideal for: Owners seeking a detailed sound profile or a full exhaust system upgrade beyond axle back modifications.
- Application:Infiniti G35/G37 2007-2014
- Type:High Flow Axle Back
- Fitment:Direct Fit
- Material:Mandrel Bent
- Made in:USA
Our verdict“This axle back kit suits G35/G37 owners wanting a quick, effective performance upgrade with minimal fuss.”
MagnaFlow Performance Cat-Back Exhaust System Kit 19637
This system is constructed from 409 stainless steel with mandrel-bent tubing, making it a durable choice for those seeking increased horsepower and torque. Compared to the PLESIU axle back, the MagnaFlow kit offers a more comprehensive upgrade, typically resulting in a more aggressive sound and noticeable power gains, though it requires verifying compatibility before purchase. Its complex installation process may challenge less experienced DIYers, but its quality build and performance benefits justify the effort. This kit is ideal for G37 owners who want a significant power boost paired with a louder, more aggressive exhaust note.
Pros:- Made from durable 409 stainless steel
- Mandrel-bent tubing for smooth exhaust flow
- Increases horsepower and torque
- Creates an aggressive, deep exhaust sound
Cons:- Requires fitment verification and possibly complex installation
- Potentially loud, which might bother some users
Best for: Performance-focused G37 owners ready to upgrade to a full cat-back system for maximum power and sound.
Not ideal for: Casual drivers or those seeking a simple, bolt-on upgrade without verifying fitment or dealing with complex installation.
- Material:409 stainless steel
- Type:Cat-Back Exhaust System
- Fitment:Verify compatibility before purchase
Our verdict“This kit is best for G37 owners who prioritize power and sound over ease of installation and cost.”
Invidia Gemini Cat-Back Exhaust System with Titanium Rolled Tip for Nissan G37 Coupe
The Invidia Gemini system elevates both performance and aesthetics with its titanium rolled tips and 60 mm piping. While this system is designed specifically for the Nissan G37 Coupe, its high-quality titanium construction offers superior durability and a sleek look that’s unmatched in style. Compared to the MagnaFlow kit, it emphasizes a more refined appearance and lighter weight, but may require professional installation, especially for the titanium tips. It’s an excellent choice for owners seeking a combination of performance, style, and a touch of exclusivity, though it does come at a higher price point and with a potentially louder exhaust note.
Pros:- Enhances exhaust performance with 60 mm piping
- Stylish titanium rolled tips for a premium look
- Lightweight titanium construction improves handling
- Designed specifically for G37 Coupe
Cons:- May require professional installation
- Potentially loud exhaust sound that may not suit all users
Best for: G37 Coupe owners wanting a high-end, stylish upgrade that combines performance with visual appeal.
Not ideal for: Sedan owners or those on a strict budget, as this system’s premium materials and specific fitment make it less versatile and more costly.
- Application:Nissan G37 Coupe (2007+)
- Piping Diameter:60 mm
- Tip Size:110 mm
- Material:Titanium
Our verdict“This high-end system is perfect for G37 Coupe owners seeking style and performance with a premium feel, despite its higher cost and installation complexity.”
PLESIU Stainless Steel Axle Back Muffler Exhaust for Infiniti G37 2008-2013
This axle back muffler features polished, double-walled 4-inch tips and 2.50-inch piping, offering a high-end look that enhances the vehicle’s appearance while improving exhaust flow. Compared to the truck exhaust kit, it provides a more refined aesthetic and a noticeable upgrade in engine breathing. However, limited information on sound levels and noise makes it less ideal for buyers prioritizing acoustic feedback. Its durable stainless steel construction and polished finish make it a stylish yet functional upgrade, but installation details are scarce, which could pose challenges for some owners.
Pros:- High-end polished stainless steel finish
- Polished 4-inch double-walled tips for style
- Improves exhaust flow and engine breathing
- Durable construction
Cons:- No details on sound or noise levels
- Installation instructions are not provided
Best for: G37 owners seeking a stylish, high-quality muffler upgrade focused on aesthetics and flow improvement.
Not ideal for: Those who want a specific sound profile or detailed noise level information, or who prefer a full exhaust system instead of just the muffler.
- Material:Stainless Steel
- Tips:4-inch Double Walled
- Piping Diameter:2.50 inches
- Flanges:3/8 inch
Our verdict“This muffler upgrade fits G37 owners who want a stylish, durable exhaust tip upgrade with flow benefits, but may lack sound profile clarity.”
409 Stainless Steel Exhaust Resonator Muffler System Kit Compatible with 2007-2008 G35 3.5L V6 & 2009-2013 G37 3.7L V6
This stainless steel exhaust resonator muffler kit stands out for its durability and ease of installation, especially compared to the more complex MagnaFlow system which offers higher performance but at a higher cost. Designed specifically for certain G35 and G37 models, it provides a direct replacement that improves engine efficiency and cuts emissions without requiring welding, making it a solid choice for budget-conscious owners seeking OEM-like quality. However, its compatibility is limited to specific years and models, which could be a downside for those with different variants or seeking a broader fit. The included gaskets and clamps simplify installation, but professional help might still be needed for a perfect fit. Compared to aftermarket systems like Invidia, this kit prioritizes durability and factory compatibility over aggressive sound or performance gains. If you want a reliable, corrosion-resistant exhaust upgrade that restores factory performance, this kit is a practical choice.
Pros:- Durable stainless steel construction resists corrosion and rust
- Easy to install without welding or specialized tools
- Improves engine efficiency and reduces emissions
Cons:- Limited to specific G35 and G37 model years and configurations
- Installation may still require professional assistance for perfect fit
- Does not enhance sound or performance beyond factory levels
Best for: G37 owners seeking a straightforward, corrosion-resistant OEM replacement that improves efficiency without increased noise or performance tuning.
Not ideal for: Performance enthusiasts looking for aggressive sound, maximum horsepower gains, or an aftermarket upgrade with less focus on OEM fit.
- Material:Stainless steel 409 grade
- Compatible vehicles:2007-2008 G35 3.5L V6, 2009-2013 G37 3.7L V6
- OE Replacement:603157, 603156, 425467
- Installation:Professional, no welding required
- Includes:Gaskets and Clamps
Our verdict“This kit is best suited for G37 owners who want a durable, OEM-style exhaust fix without the complexity or cost of high-performance systems.”
Northeastern Exhaust Stainless Steel Front Y-Pipe, Resonator, and Mufflers Exhaust System Kit for Infiniti M37 2011-2013 3.7L
This stainless steel exhaust kit is tailored for Infiniti M37 models and offers a more aggressive upgrade compared to the G37-specific resonator kit. It includes a Y-pipe, resonator, and mufflers, which collectively can boost horsepower and torque by optimizing exhaust flow—a benefit not as prominent in the G35/G37 OEM replacement kits like the one from B0GWHDD44N. Its lifetime warranty adds reassurance, but the installation might be more complex and typically requires professional help, similar to the MagnaFlow or Invidia systems. While it’s designed for hassle-free setup without welding, damages during shipping or improper installation could incur costs not covered by the warranty. This kit excels for owners who want a significant performance increase without sacrificing durability, especially if they’re already planning a more comprehensive exhaust overhaul. It’s less suited for G37 owners who prioritize simple replacement or OEM-like qualities.
Pros:- Made from durable stainless steel (409 grade)
- Includes Y-pipe, resonator, and mufflers for comprehensive flow improvement
- Easy installation without welding required
- Lifetime warranty provides extended coverage
Cons:- Installation can be complex and may need professional help
- Warranty does not cover shipping or labor costs
- Potential damages during shipping or improper setup are non-refundable
Best for: Infiniti M37 owners looking for a high-durability, performance-boosting exhaust upgrade with long-term warranty security.
Not ideal for: G37 owners seeking a direct, plug-and-play replacement or those uninterested in significant horsepower gains.
- Material:Stainless Steel 409 Grade
- Compatibility:Infiniti M37 2011-2013 3.7L
- Includes:Y-Pipe, Resonator, Mufflers, Gaskets, Clamps
- Warranty:Lifetime
- Installation:Professional recommended, no welding
Our verdict“This system offers aggressive performance gains for M37 owners comfortable with professional installation and seeking long-term durability.”
How We Picked
I evaluated the exhaust systems based on key factors such as material quality, ease of installation, sound profile, performance gains, and value for money. Systems that offered a straightforward installation process and reliable durability ranked higher, especially for users seeking a hassle-free upgrade. I prioritized products with proven fitment for the Infiniti G37, considering user reviews and brand reputation. The ranking reflects a balance between performance enhancements and practical usability, helping different buyer types find suitable options.Factors to Consider When Choosing Best Cat-back Exhaust Systems For Infiniti G37
When selecting a cat-back exhaust system for your Infiniti G37, it’s essential to consider several factors that impact both performance and daily driving comfort. While sound and appearance are key, durability and ease of installation also play critical roles. Understanding these elements can help you avoid common pitfalls, such as choosing an exhaust that’s too loud or incompatible with your vehicle’s setup.Material Quality and Durability
Opt for exhaust systems made of stainless steel, especially 409 or 304 grade, as they resist corrosion and maintain structural integrity over time. High-quality materials ensure your investment withstands the elements and driving conditions without rusting or cracking. Cheaper materials may save money initially but often lead to costly replacements or repairs later.Sound Profile and Volume
Consider how loud you want your G37 to be. More aggressive systems produce a sporty, noticeable sound, ideal for enthusiasts, but they can become intrusive on daily drives or long trips. Moderately tuned exhausts strike a balance, providing a richer tone without excessive noise. Be mindful that some systems may require additional tuning or muffler modifications for preferred sound levels.Ease of Installation
A direct-fit system that requires minimal modifications is preferable for most owners, especially those less experienced with car work. Bolt-on kits that come with all necessary hardware save time and reduce frustration. However, custom or semi-custom systems can offer more tuning options but typically demand more skill and effort.Performance Gains and Tuning Compatibility
Look for exhausts that promise measurable improvements in horsepower and torque, particularly if you’re aiming for noticeable performance upgrades. Some systems are designed to work seamlessly with other modifications, like cold air intakes or ECU tunes, amplifying their benefits. Be cautious if a system claims large gains without supporting components—real-world results often depend on a balanced setup.Price and Value
While premium exhaust systems tend to deliver better durability and sound, not every driver needs the most expensive option. Determine your priorities—whether it’s sound, performance, or longevity—and choose a system that offers the best value within your budget. Sometimes, investing a little more upfront pays off through longer-lasting materials and enhanced driving experience.Frequently Asked Questions
Will installing a cat-back exhaust void my Infiniti G37’s warranty?
Installing a cat-back exhaust system can potentially affect your vehicle’s warranty, especially if it’s linked to emissions or powertrain components. However, many manufacturers design these systems to be bolt-on and maintain compliance, so the impact varies. It’s wise to check with your dealer or review your warranty terms beforehand to avoid surprises, and consider choosing systems that are EPA-compliant.How much louder will my Infiniti G37 be after installing a new exhaust?
The sound level depends on the specific system chosen. Some exhausts offer a subtle increase in tone suitable for daily driving, while others deliver a deep, aggressive roar that’s unmistakable. If you prefer a mild enhancement, look for systems marketed as ‘moderate’ or ‘mild.’ For a more aggressive sound, models with straight-through mufflers or titanium tips tend to produce louder exhaust notes.Can I install an aftermarket exhaust system myself?
Many cat-back exhausts are designed for straightforward installation, often requiring only basic hand tools and some mechanical know-how. However, some setups might involve cutting or more complex fittings, which can be challenging for beginners. If you’re unsure, consulting a professional or following detailed installation guides can help ensure a proper fit and avoid damage.Will a new exhaust system improve my G37’s fuel economy?
In some cases, upgrading to a well-designed exhaust can improve airflow and slightly boost fuel efficiency, especially if paired with other performance modifications. However, the primary benefit is often sound and power rather than fuel savings. Excessively loud or free-flowing systems may sometimes lead to increased fuel consumption if they encourage aggressive driving.What should I consider if I want a lightweight exhaust system?
Choosing titanium or specialty alloys can significantly reduce weight, which benefits handling and acceleration. Keep in mind that these materials tend to be more expensive. Confirm that the lightweight system maintains durability and quality, as cheaper alternatives might compromise longevity. For enthusiasts focused on performance, the weight savings often justify the higher cost.Conclusion
For most G37 owners, the MagnaFlow Performance Cat-Back Exhaust System offers an excellent blend of sound, durability, and performance, making it the best overall choice. Those seeking a more aggressive tone at a reasonable price should consider the Invidia Gemini Titanium Exhaust. If budget is a priority, the PLESIU Stainless Steel Axle Back Muffler provides decent performance without breaking the bank. Beginners or casual owners will appreciate systems that are straightforward to install, while enthusiasts aiming for maximum weight savings or customization might lean toward premium titanium options. Ultimately, your decision should align with your driving style, sound preference, and budget constraints.Halloween Picks
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