2007 Lexus IS350: Catback Exhaust Upgrade Guide

by Alex Braham 48 views

Hey guys! Are you looking to boost the performance and sound of your 2007 Lexus IS350? One of the best ways to do that is by upgrading your car's exhaust system, specifically with a cat-back exhaust! In this guide, we're diving deep into everything you need to know about cat-back exhausts for your IS350. This includes understanding what they are, their benefits, what to look for when buying one, and even a step-by-step guide on how to install it! So, buckle up and let's get started on this exciting journey to enhance your ride!

What is a Cat-Back Exhaust System?

Okay, so what exactly is a cat-back exhaust system? The term "cat-back" refers to the exhaust components behind the catalytic converters. In your 2007 Lexus IS350, a cat-back system typically includes the mid-pipe, resonator (if equipped), muffler, and exhaust tips. These components replace the factory parts from the outlet of the catalytic converters to the very end of your exhaust system. This modification is a popular choice among car enthusiasts for several reasons, primarily because it offers a balance of performance gains, improved sound, and relatively straightforward installation.

The stock exhaust systems on many vehicles, including the IS350, are designed with a focus on noise reduction and cost-effectiveness. This often means using smaller diameter pipes and restrictive mufflers that can limit the engine's ability to breathe efficiently. By replacing these parts with a cat-back system, you're essentially opening up the exhaust flow, allowing the engine to expel exhaust gases more easily. This can lead to noticeable improvements in horsepower and torque, especially in the mid to upper RPM ranges. Moreover, the aftermarket cat-back systems are typically made from higher-quality materials like stainless steel, which are more durable and resistant to corrosion than the stock exhaust components. This ensures that your investment lasts for years to come, providing consistent performance and sound. Beyond the functional benefits, a cat-back exhaust system also significantly enhances the auditory experience of driving your IS350. The aftermarket mufflers are designed to produce a deeper, more aggressive exhaust note that adds to the sporty character of the car. This improved sound can transform the driving experience, making it more engaging and enjoyable. However, it's important to choose a system that strikes the right balance between sound and comfort, as some systems can be quite loud, which may not be ideal for daily driving. Overall, a cat-back exhaust system is a well-rounded upgrade that offers a combination of performance, durability, and enhanced sound, making it a worthwhile investment for any IS350 owner looking to improve their car.

Benefits of Upgrading Your IS350's Exhaust

So, why should you even bother upgrading your 2007 Lexus IS350's exhaust system? Well, the benefits are numerous and can significantly enhance your driving experience. Let's break down the key advantages:

  • Increased Horsepower and Torque: This is probably the most enticing reason for many car enthusiasts. A cat-back exhaust system reduces exhaust backpressure, allowing your engine to breathe more efficiently. This can result in a noticeable bump in horsepower and torque, especially in the mid to high RPM range. While the gains might not be earth-shattering, they're definitely noticeable and make the car feel more responsive.
  • Enhanced Sound: Stock exhaust systems are often designed to be quiet and unobtrusive. An aftermarket cat-back exhaust, on the other hand, can give your IS350 a much more aggressive and sporty sound. You'll get a deeper, throatier exhaust note that will turn heads wherever you go. It's like giving your car a voice that matches its sporty appearance.
  • Improved Fuel Efficiency: While not the primary reason for upgrading, a cat-back exhaust can improve your fuel efficiency slightly. By reducing backpressure, the engine doesn't have to work as hard to expel exhaust gases, which can translate into better gas mileage. However, keep in mind that this benefit is often overshadowed by the temptation to put your foot down and enjoy the new sound!
  • Aesthetic Appeal: Many cat-back exhaust systems come with polished stainless steel exhaust tips that look much better than the stock ones. This can add a touch of visual flair to the rear of your IS350, making it stand out from the crowd. Plus, a clean, shiny exhaust system just looks cool!
  • Durability: Aftermarket exhaust systems are typically made from higher-quality materials like stainless steel, which are more resistant to rust and corrosion than the factory exhaust. This means your new exhaust system will last longer and look better for years to come.
  • Weight Reduction: Some aftermarket exhaust systems are lighter than the stock units, which can contribute to a slight improvement in handling and acceleration. While the weight savings might not be huge, every little bit helps!

In summary, upgrading your IS350's exhaust system with a cat-back kit offers a comprehensive set of benefits that improve performance, sound, aesthetics, and durability. It’s a fantastic way to enhance your driving experience and make your car more enjoyable to own.

What to Look for When Buying a Cat-Back Exhaust

Alright, so you're convinced that a cat-back exhaust is the way to go for your 2007 Lexus IS350. But with so many options on the market, how do you choose the right one? Here are some key factors to consider:

  1. Material Quality: Stainless steel is the gold standard for exhaust systems due to its excellent corrosion resistance and durability. Look for systems made from 304 or 409 stainless steel. Aluminized steel is a cheaper alternative but is more prone to rust.
  2. Pipe Diameter: A larger diameter pipe generally allows for better exhaust flow. However, going too large can actually reduce performance by decreasing exhaust velocity. For the IS350, a 2.25-inch to 2.5-inch diameter is generally a good choice.
  3. Sound Level: Exhaust sound is subjective, so consider what kind of sound you're looking for. Do you want a deep, aggressive rumble, or something more subtle? Listen to sound clips online before making a decision. Keep in mind that some systems can be quite loud, which may not be ideal for daily driving.
  4. Fitment: Make sure the exhaust system is specifically designed for the 2007 Lexus IS350. A direct-fit system will bolt right in without any modifications. Avoid universal systems that may require cutting and welding.
  5. Brand Reputation: Stick with reputable brands that have a proven track record of producing high-quality exhaust systems. Some popular brands for the IS350 include Borla, Invidia, Magnaflow, and Tanabe.
  6. Price: Cat-back exhaust systems can range in price from a few hundred dollars to over a thousand. Set a budget and stick to it. Keep in mind that you often get what you pay for, so don't skimp on quality.
  7. Installation: Consider whether you want to install the exhaust system yourself or have a professional do it. Some systems are easier to install than others. If you're not comfortable working on cars, it's best to leave it to the pros.
  8. Reviews: Read reviews from other IS350 owners who have installed the exhaust system you're considering. This can give you valuable insights into the system's performance, sound, and fitment.

By carefully considering these factors, you can choose a cat-back exhaust system that will perfectly complement your 2007 Lexus IS350 and provide you with years of driving enjoyment.

Step-by-Step Installation Guide

Okay, so you've got your new cat-back exhaust system, and you're ready to install it yourself. Here's a general step-by-step guide to help you through the process. Remember to always consult the manufacturer's instructions for your specific exhaust system, as the steps may vary slightly.

Tools You'll Need:

  • Socket set
  • Wrench set
  • Penetrating oil
  • Jack and jack stands
  • Rubber mallet
  • Exhaust hanger removal tool (optional, but helpful)
  • Torque wrench
  • Safety glasses
  • Gloves

Step 1: Prepare Your Vehicle

  • Park your IS350 on a level surface and engage the parking brake.
  • Loosen the lug nuts on the rear wheels.
  • Jack up the rear of the car and securely support it with jack stands.
  • Safety First: Always wear safety glasses and gloves to protect yourself.

Step 2: Remove the Old Exhaust System

  • Spray penetrating oil on all the bolts and exhaust hangers to loosen them up. Let it soak for a few minutes.
  • Disconnect the exhaust system from the catalytic converters. This usually involves unbolting a flange connection.
  • Remove the exhaust hangers from the rubber isolators. An exhaust hanger removal tool can make this easier, but you can also use a pry bar or screwdriver.
  • Carefully remove the old exhaust system from under the car. It may be heavy, so get a friend to help you if needed.

Step 3: Install the New Exhaust System

  • Compare the new exhaust system to the old one to make sure you have all the necessary parts and hardware.
  • Install the new exhaust hangers onto the new exhaust system.
  • Carefully lift the new exhaust system into place under the car.
  • Connect the exhaust system to the catalytic converters. Use new gaskets if provided.
  • Install the exhaust hangers into the rubber isolators.
  • Adjust the exhaust system to ensure it's properly aligned and not touching any part of the car.

Step 4: Tighten All Connections

  • Torque all bolts to the manufacturer's specifications using a torque wrench.
  • Double-check all connections to make sure they're tight.

Step 5: Final Checks

  • Lower the car back to the ground.
  • Tighten the lug nuts on the rear wheels.
  • Start the engine and listen for any exhaust leaks. If you hear a leak, tighten the connections until it's gone.
  • Take the car for a test drive and enjoy your new exhaust system!

Important Notes:

  • If you're not comfortable performing this installation yourself, it's best to have a professional do it.
  • Make sure to dispose of the old exhaust system properly.
  • Check your local laws regarding exhaust modifications to ensure your new system is legal.

By following these steps, you can successfully install a cat-back exhaust system on your 2007 Lexus IS350 and enjoy the benefits of improved performance and sound. Happy wrenching!

Top Cat-Back Exhaust Systems for the 2007 Lexus IS350

To give you a head start, here are some of the top-rated cat-back exhaust systems that are known to be a great fit for the 2007 Lexus IS350. These are popular among IS350 owners for their quality, performance gains, and sound:

  1. Borla Cat-Back Exhaust Systems: Borla is a well-known name in the exhaust industry, and their systems for the IS350 are highly regarded. They offer different series like the Atak, S-Type, and Touring, each with varying levels of sound aggressiveness. Borla systems are known for their high-quality stainless steel construction, precise fitment, and noticeable performance gains.

  2. Invidia Q300 Cat-Back Exhaust: The Invidia Q300 is a popular choice for those who want a balance of performance and a refined sound. It features a resonated mid-pipe to reduce drone, making it suitable for daily driving. The Q300 is made from high-quality stainless steel and offers excellent fitment.

  3. MagnaFlow Cat-Back Exhaust Systems: MagnaFlow offers a range of cat-back systems for the IS350 that are designed to improve exhaust flow and increase horsepower. Their systems are known for their smooth, deep sound and durable construction.

  4. Tanabe Medalion Touring Exhaust: Tanabe is known for its high-quality Japanese-made exhaust systems. The Medalion Touring exhaust is designed for those who want a sporty sound without being too loud. It offers a comfortable and enjoyable driving experience while still providing performance benefits.

  5. ARK Performance Cat-Back Exhaust: ARK Performance exhaust systems are designed for maximum performance gains and a more aggressive exhaust note. These systems often feature larger diameter piping and free-flowing mufflers.

When choosing, consider the sound level you're comfortable with, the type of driving you do most often, and your budget. Always read reviews and listen to sound clips to get a better idea of what to expect from each system. Investing in a well-regarded brand ensures that you're getting a product that is designed to perform and last.

Final Thoughts

Upgrading your 2007 Lexus IS350 with a cat-back exhaust system is a fantastic way to enhance your driving experience. From increased horsepower and torque to an enhanced exhaust note and improved aesthetics, the benefits are numerous. By carefully considering your options and choosing the right system for your needs, you can transform your IS350 into an even more enjoyable and exciting car to drive. So, what are you waiting for? Dive in, do your research, and get ready to experience the thrill of a new exhaust system on your Lexus IS350!