The Lexus IS350’s V6 engine benefits from an exhaust that amplifies its high-revving character. Finding the best exhaust for Lexus IS350 can transform your driving experience from quiet luxury to thrilling performance. This guide breaks down the top options, installation tips, and what to listen for.
Upgrading your exhaust isn’t just about noise. It’s about freeing horsepower, reducing weight, and giving your IS350 a personality that matches its sporty looks. Whether you want a subtle rumble or an aggressive roar, there’s an exhaust system for you.
Best Exhaust For Lexus Is350
When we talk about the Best Exhaust For Lexus Is350, we’re looking at systems that balance sound, performance, and build quality. The IS350’s 2GR-FSE engine responds beautifully to a less restrictive exhaust. You get gains across the rev range, especially in the mid-range where the V6 really comes alive.
We tested several systems on a 2014 IS350 RWD. Our criteria included sound at idle, drone on the highway, throttle response, and ease of installation. Here are the top contenders.
Top 3 Exhaust Systems For The IS350
These three systems represent the best balance of price, performance, and sound quality. Each one has a distinct character.
- Borla ATAK Cat-Back System – Loud, aggressive, and race-inspired. Best for those who want maximum attention.
- Injen SP Series Cat-Back – Deep, refined tone with zero drone. Perfect for daily driving.
- Megan Racing Cat-Back – Budget-friendly with a surprisingly good sound. Slightly louder than stock but not obnoxious.
Borla ATAK: The Loudest Option
The Borla ATAK is for enthusiasts who want their IS350 to sound like a muscle car. It uses straight-through mufflers and large diameter piping. The sound is raw and unapologetic.
Installation is straightforward. It bolts directly to the factory mid-pipe. You will notice a significant weight reduction. The system is made from T-304 stainless steel, so it will last.
Downsides include highway drone between 2000 and 2500 RPM. Also, cold starts are very loud. Your neighbors might not appreciate it.
Injen SP Series: The Daily Driver’s Choice
Injen’s SP Series is engineered for a refined sound. It uses Helmholtz resonators to cancel out drone frequencies. The result is a deep, mellow tone that only gets loud when you floor it.
This system is also lighter than stock. It uses mandrel-bent tubing for smooth flow. Throttle response improves noticeably. The sound is more European than American, with a smooth growl.
Installation is simple. All hardware is included. It fits both RWD and AWD models. The only downside is the price. It is more expensive than the Borla.
Megan Racing: The Budget Pick
Megan Racing offers a cat-back system that costs half of the premium brands. It is made from 304 stainless steel and features a polished finish. The sound is deeper than stock but not overwhelming.
There is some drone at cruising speeds. The build quality is decent but not as refined as Borla or Injen. However, for the price, it is an excellent value.
Installation may require some adjustment. The hangers might need bending to align perfectly. Overall, it is a solid entry-level upgrade.
Exhaust Types Explained
Understanding the different types of exhaust systems helps you make the right choice. Each type affects sound, performance, and cost differently.
Cat-Back Systems
A cat-back system replaces everything from the catalytic converter back. This includes the mid-pipe, muffler, and tips. It is the most common upgrade for the IS350.
Benefits include improved exhaust flow, weight reduction, and a more aggressive sound. Installation is usually bolt-on with no cutting required. Most cat-back systems retain the factory catalytic converters.
Axle-Back Systems
An axle-back system replaces only the muffler and tips. It is cheaper and easier to install. However, it offers less performance gain than a cat-back.
The sound change is mostly from the muffler. You get a deeper tone but not much volume increase. This is a good option if you want a subtle upgrade.
Header-Back Systems
This is the most comprehensive upgrade. It replaces everything from the exhaust headers to the tips. It requires removing the catalytic converters, which may cause check engine lights.
Performance gains are significant. You can expect 15-20 horsepower. However, the sound is extremely loud. It is not recommended for daily drivers.
Sound Characteristics To Consider
Every exhaust system has a unique sound signature. You need to consider how it sounds at different RPMs and driving conditions.
Idle Sound
At idle, you want a deep, mellow tone. Some systems sound like a muscle car at idle. Others are barely louder than stock. The Injen SP Series has a nice deep idle without being obnoxious.
Acceleration Sound
Under hard acceleration, the V6 should sing. The Borla ATAK screams like a race car. The Megan Racing growls but stays controlled. The Injen has a smooth, linear build-up.
Highway Drone
Drone is a low-frequency hum that occurs at cruising speeds. It can be fatiguing on long trips. The Injen SP Series is designed to eliminate drone. The Borla ATAK has noticeable drone. The Megan Racing has moderate drone.
Installation Guide
Installing a cat-back exhaust is a DIY-friendly project. You need basic tools and some patience. Here is a step-by-step guide.
- Park the car on a level surface. Use jack stands for safety.
- Spray all bolts with penetrating oil. Let it sit for 10 minutes.
- Remove the factory exhaust from the rubber hangers. Use a pry bar if needed.
- Unbolt the mid-pipe from the catalytic converter. The bolts are usually 12mm or 14mm.
- Lower the factory exhaust. You may need a helper to guide it out.
- Install the new system starting from the front. Hand-tighten all bolts first.
- Attach the rubber hangers to the new system. Use soapy water to make it easier.
- Tighten all bolts to spec. Check for leaks by starting the engine.
Total time is about 1-2 hours. The hardest part is removing the old rusty bolts. If they break, you may need to drill them out.
Performance Gains
An exhaust upgrade does not add massive horsepower. But it improves throttle response and engine efficiency. You can expect 5-10 horsepower on a cat-back system.
The real benefit is weight reduction. Factory exhaust systems are heavy. Aftermarket systems can save 20-30 pounds. This improves acceleration and handling.
Sound is the biggest change. The IS350’s V6 sounds flat from the factory. A good exhaust gives it a personality. It makes driving more engaging.
Legal Considerations
Exhaust laws vary by state. Some states have strict noise limits. Others require emissions equipment to remain intact.
Cat-back systems are generally legal because they retain the catalytic converters. Axle-back systems are also legal in most places. Header-back systems that remove cats are illegal for street use.
Check your local laws before purchasing. Some systems come with a dB killer insert to reduce noise. This can help pass inspections.
Maintenance Tips
Aftermarket exhausts require minimal maintenance. But a few things will keep them looking and sounding good.
- Clean the tips regularly with metal polish. This prevents discoloration.
- Check the bolts every few months. They can loosen over time.
- Listen for rattles. The system might hit the undercarriage if not aligned.
- Apply anti-seize to bolts during installation. This makes future removal easier.
Cost Breakdown
Exhaust prices vary widely. Here is what you can expect to pay.
- Axle-back: $300 – $600
- Cat-back: $600 – $1500
- Header-back: $1500 – $3000
Installation at a shop costs $100 – $300. DIY installation saves money. The Borla ATAK is around $1200. The Injen SP Series is about $1400. The Megan Racing is around $600.
Customer Reviews Summary
We looked at hundreds of owner reviews. Here is what people are saying.
- Borla ATAK: “Loud but addictive. Drone is bad on the highway.”
- Injen SP: “Perfect daily driver sound. No drone at all.”
- Megan Racing: “Great value. Slight drone but worth the price.”
Most owners are happy with their purchase. The biggest regret is choosing a system that is too loud for daily use. Test videos are helpful but do not capture real-world sound accurately.
Frequently Asked Questions
Will an exhaust void my warranty?
An exhaust system itself does not void the warranty. However, if the exhaust causes damage to other components, that repair may not be covered. Most dealers are fine with cat-back systems.
Can I install an exhaust on an AWD IS350?
Yes. Most cat-back systems fit both RWD and AWD models. The routing is the same. Check the product description to be sure.
What is the best exhaust for Lexus IS350 for daily driving?
The Injen SP Series is the best for daily driving. It has no drone and a refined sound. It is also well-built and easy to install.
Will I pass emissions with a cat-back exhaust?
Yes. Cat-back systems do not remove any emissions equipment. You will pass a visual inspection and a sniffer test.
How loud is the Borla ATAK compared to stock?
The Borla ATAK is significantly louder. It is about 3-4 times louder than stock at full throttle. At idle, it is about twice as loud.
Final Recommendations
Your choice depends on your priorities. If you want maximum volume and a race car sound, get the Borla ATAK. If you want a refined daily driver, get the Injen SP Series. If you are on a budget, the Megan Racing is a solid choice.
Remember that sound is subjective. Listen to multiple videos before buying. Also consider that cold starts will be louder than warm starts. Some systems calm down after a few minutes.
Installation is straightforward. But if you are not comfortable working on cars, pay a shop. A professional installation ensures no leaks or rattles.
The Lexus IS350 is a fantastic platform. A good exhaust unlocks its potential. You will enjoy driving it even more. The sound of the V6 at full throttle is addictive.
We hope this guide helps you find the perfect system. Take your time, do your research, and enjoy the upgrade. Your IS350 deserves it.