We researched the top 370z exhaust systems on the market, comparing manufacturer specifications, published sound data, and aggregated owner feedback. Our evaluation focuses on performance gains, build quality, ease of installation, and overall value to help you choose the best system for your driving style and budget.
| Photo | Product | Score | Buy |
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Injen Evolution Cat-Back Exhaust Best Overall Cat-back, 3-inch piping, polished stainless steel, dual tips |
9.0 | 🛒 Check Price |
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Stillen Cat-Back Exhaust System Best Value Cat-back, 2.5-inch piping, stainless steel, dual tips |
8.7 | 🛒 Check Price |
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Fast Intentions Cat-Back Exhaust Premium Pick Cat-back, 3-inch piping, T304 stainless steel, single or dual tip options |
8.4 | 🛒 Check Price |
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Motordyne Shockwave Cat-Back Exhaust Best Sound Cat-back, 3-inch piping, T304 stainless steel, Helmholtz resonator |
8.1 | 🛒 Check Price |
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AAM Competition S-Line Cat-Back Exhaust Aggressive Option Cat-back, 2.5-inch piping, stainless steel, dual 4-inch tips |
7.8 | 🛒 Check Price |
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Z1 Motorsports Cat-Back Exhaust Balanced Performer Cat-back, 3-inch piping, stainless steel, dual tips |
8.3 | 🛒 Check Price |
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ARK Performance Grip Cat-Back Exhaust Lightweight Option Cat-back, 2.5-inch piping, titanium tips, stainless steel construction |
7.3 | 🛒 Check Price |
1. Injen Evolution Cat-Back Exhaust: Best Overall
The Injen Evolution Cat-Back Exhaust is a top performer in our evaluation. Based on manufacturer specs and owner feedback, it delivers noticeable power gains across the RPM range, especially in the mid-range where the 370z often feels restricted. The 3-inch mandrel-bent piping reduces backpressure, and the polished T304 stainless steel ensures long-term durability. Owners report a deep, aggressive exhaust note that isn’t overly intrusive on the highway.
However, the price is on the higher side, and some daily drivers may find the volume a bit much for long commutes. Those seeking a quieter, more subtle exhaust should consider other options. This system is best for enthusiasts who prioritize performance and a pronounced exhaust note.
- Large 3-inch mandrel-bent piping for improved flow and power gains
- T304 stainless steel construction with polished finish for corrosion resistance
- Produces a deep, aggressive tone without excessive drone on the highway
Pros: Significant horsepower and torque gains in the mid-range; High-quality welds and fitment; Lifetime warranty
Cons: Higher price point than some competitors; May be too loud for some daily drivers
2. Stillen Cat-Back Exhaust System: Best Value
The Stillen Cat-Back Exhaust System offers excellent value in our comparison. It uses 2.5-inch mandrel-bent tubing, which provides a good compromise between flow improvement and sound management. Based on owner feedback, the exhaust note is sporty but refined, making it suitable for daily driving. The stainless steel construction ensures durability, and installation is straightforward with basic tools.
That said, the power gains are more modest than those from 3-inch systems, and the sound may be too tame for those seeking an aggressive roar. This system is ideal for owners who want a quality upgrade without breaking the bank or attracting too much attention.
- 2.5-inch mandrel-bent tubing offers a balance of flow and sound control
- Durable stainless steel construction with a polished finish
- Includes all necessary hardware for a straightforward bolt-on installation
Pros: Great value for the performance improvement; Clean, refined exhaust note without excessive drone; Easy installation with no modifications required
Cons: Not as loud as some competitors; Modest power gains compared to larger diameter systems
3. Fast Intentions Cat-Back Exhaust: Premium Pick
The Fast Intentions Cat-Back Exhaust is a premium option for those who demand the best. Our research shows it offers some of the highest power gains among cat-back systems, thanks to its 3-inch mandrel-bent piping and high-flow design. The T304 stainless steel construction and hand TIG welding are top-notch, ensuring longevity. Owners praise the ability to choose between resonated and non-resonated mid-pipes to tailor the sound.
However, the price is steep, and the custom nature means longer wait times. This system is not for budget-conscious buyers or those who need an exhaust quickly. It is best suited for serious enthusiasts who value performance and craftsmanship above all else.
- High-flow 3-inch mandrel-bent piping for maximum performance
- Available with resonated or non-resonated mid-pipe for sound tuning
- Handcrafted in the USA with premium materials and welds
Pros: Exceptional build quality and craftsmanship; Customizable sound with resonated option; Significant horsepower gains on dyno tests
Cons: Very expensive compared to alternatives; Long lead times due to custom fabrication
4. Motordyne Shockwave Cat-Back Exhaust: Best Sound
The Motordyne Shockwave Cat-Back Exhaust is renowned for its distinctive sound. Our evaluation of owner feedback and audio clips confirms it produces a deep, exotic tone without the drone commonly associated with large-diameter exhausts. The Helmholtz resonator technology effectively cancels unwanted frequencies. The 3-inch T304 stainless steel piping ensures solid performance gains.
On the downside, the high price and frequent stock shortages make it difficult to obtain. Installation can be more involved due to the resonator design. This exhaust is for purists who prioritize sound quality and are willing to pay a premium and wait for availability.
- 3-inch mandrel-bent tubing for optimal flow
- Helmholtz resonator technology eliminates drone without baffles
- Deep, exotic exhaust note with no raspiness
Pros: Unique, exotic sound that stands out; Drone-free at highway speeds; High-quality stainless steel construction
Cons: Very expensive and often out of stock; Complex design may complicate installation
5. AAM Competition S-Line Cat-Back Exhaust: Aggressive Option
The AAM Competition S-Line Cat-Back Exhaust is designed for those who want an aggressive sound without spending a fortune. Based on owner reports, it delivers a loud, raw exhaust note that turns heads. The 2.5-inch piping and large tips give the 370z a menacing appearance. It is one of the more affordable cat-back options.
However, fitment can be inconsistent, and some owners have experienced drone on the highway. The build quality is decent but not on par with premium brands. This exhaust is best for owners on a budget who prioritize loudness and are willing to deal with potential installation quirks.
- 2.5-inch mandrel-bent tubing with an aggressive sound profile
- Large 4-inch double-walled tips for a bold look
- Includes gaskets and hardware for installation
Pros: Loud, aggressive exhaust note; Affordable price point; Visually striking tips
Cons: Some owners report fitment issues; Less refined sound, some drone at certain RPMs
6. Z1 Motorsports Cat-Back Exhaust: Balanced Performer
The Z1 Motorsports Cat-Back Exhaust strikes a solid balance between performance, quality, and price. Our research indicates it offers good power gains thanks to its 3-inch mandrel-bent piping, while the sound is sporty but not overwhelming. The T304 stainless steel construction ensures durability, and installation is straightforward with a direct bolt-on design.
Some owners find the exhaust note too conservative compared to louder options, and the non-adjustable tips may not suit everyone’s aesthetic. This system is ideal for daily drivers who want a performance boost without excessive noise or fitment headaches.
- 3-inch mandrel-bent piping for maximum flow
- T304 stainless steel with a brushed finish
- Direct fit with no modifications needed
Pros: Good power gains and sound balance; Quality construction with proper fitment; Reasonable price for a 3-inch system
Cons: Sound may be too mild for some; Tips are not adjustable
7. ARK Performance Grip Cat-Back Exhaust: Lightweight Option
The ARK Performance Grip Cat-Back Exhaust focuses on weight savings and a refined sound. It uses a Helmholtz resonator to minimize drone, making it comfortable for long drives. The titanium tips add a distinctive visual touch. Based on owner feedback, the sound is deep and mellow, not overly aggressive.
However, power gains are modest compared to 3-inch systems, and some owners have experienced discoloration of the titanium tips over time. This exhaust is best for those who prioritize weight reduction and a refined sound over maximum performance.
- 2.5-inch mandrel-bent tubing with titanium exhaust tips
- Helmholtz resonator for drone reduction
- Lighter than stock exhaust system
Pros: Reduced weight over stock; Titanium tips offer a unique look; Drone-free highway cruising
Cons: Modest power gains; Some owners report premature tip discoloration
Frequently Asked Questions
What is the difference between cat-back and axle-back exhaust systems?
A cat-back exhaust replaces the exhaust system from the catalytic converter back to the tips, including the mid-pipe and muffler. An axle-back exhaust only replaces the muffler and tips behind the rear axle. Cat-back systems generally offer greater performance gains and sound changes, while axle-back systems are simpler and cheaper but yield more modest improvements.
Will an exhaust system void my 370z warranty?
An aftermarket exhaust system will not automatically void your entire warranty. However, if a failure is directly caused by the exhaust (e.g., a cracked manifold from increased heat), that specific repair may not be covered. Most dealers are reasonable, but it is best to check with your dealer and keep your stock parts.
How loud are 370z exhaust systems?
Loudness varies widely. Axle-back systems are generally louder than stock but can be mild. Cat-back systems with 3-inch piping and no resonators are the loudest. Many systems offer resonated options to reduce volume. Check decibel ratings and owner reviews for real-world noise levels.
Do I need a tune after installing a cat-back exhaust?
A cat-back exhaust alone does not require a tune, as it does not alter the engine’s air-fuel ratio. However, pairing it with an intake or headers may benefit from a tune. For maximum power gains, a professional tune can optimize performance.
Can I install a 370z exhaust myself?
Yes, most cat-back and axle-back systems are designed for bolt-on installation with basic hand tools. However, some systems may require cutting or welding if they replace more than the stock cat-back. Always follow the manufacturer’s instructions and consider professional installation if you are not mechanically inclined.
Our Verdict
After extensive research and comparison, the Injen Evolution Cat-Back Exhaust earns our top pick for its excellent balance of performance, sound, and build quality. It offers significant power gains and a deep tone without excessive drone. For those seeking great value, the Stillen Cat-Back Exhaust is a close runner-up, delivering a refined sound and solid performance at a more accessible price point.
