So, you're thinking about upgrading the catback exhaust on your 2007 Lexus IS350? Awesome choice! A new exhaust system can seriously transform your driving experience, not just in terms of performance, but also with a sweet, aggressive sound that'll turn heads wherever you go. In this article, we'll dive deep into everything you need to know about choosing the right catback exhaust for your ride.

Why Upgrade Your Lexus IS350's Catback Exhaust?

Let's kick things off by talking about why you'd even want to swap out your factory exhaust in the first place. The stock exhaust on the IS350 is, well, pretty tame. Lexus designed it for quiet comfort, not exactly for unleashing the beast within that 3.5-liter V6.

Here’s the deal: Upgrading to an aftermarket catback exhaust offers several benefits, and we're going to break them down for you:

Enhanced Exhaust Sound

The most immediate and noticeable change is the sound. A catback exhaust replaces the section of your exhaust system from the catalytic converters back to the tailpipe. This allows you to fine-tune the exhaust note. Want a deep, throaty rumble? Or maybe a high-pitched, exotic scream? The choice is yours! Aftermarket exhausts use different muffler designs and pipe diameters to achieve various sound characteristics. When selecting the right exhaust system, sound preference should absolutely be a top priority.

Increased Horsepower and Torque

While not always a massive gain, a catback exhaust can definitely bump up your horsepower and torque figures. The factory exhaust systems are often designed to be restrictive to reduce noise and emissions. An aftermarket system, especially one with larger diameter piping and a less restrictive muffler, can improve exhaust flow, allowing the engine to breathe more freely. This translates to more power, especially in the mid to high RPM range, giving you better acceleration and overall performance. It's like letting your engine finally take a deep breath!

Improved Aesthetics

Let's be honest, the stock exhaust tips on the IS350 aren't exactly eye-catching. A new catback exhaust usually comes with polished or unique exhaust tips that can significantly enhance the rear of your car. Whether you prefer a classic, round tip, a more aggressive angled cut, or even quad tips, there's a style out there to match your taste. This visual upgrade adds a touch of sportiness and aggression to your Lexus.

Weight Reduction

Some aftermarket catback exhausts are made from lighter materials like stainless steel or titanium, which can reduce the overall weight of your car. While the weight savings might not be huge, every little bit helps with handling and performance. Plus, shedding a few pounds is always a good thing, right?

What to Look for in a 2007 Lexus IS350 Catback Exhaust

Alright, so you're sold on the idea of upgrading your exhaust. Now comes the fun part: choosing the right one. With so many options on the market, it can be a little overwhelming. Here's what you need to consider:

Material

The material your exhaust is made from will affect its durability, weight, and price. Here are the most common options:

• Stainless Steel: This is the most popular choice. It's durable, corrosion-resistant, and relatively affordable. Stainless steel exhausts offer a good balance of quality and value.
• Aluminized Steel: This is a cheaper option, but it's not as resistant to rust as stainless steel. It's fine if you live in a dry climate, but it's not recommended for areas with harsh winters or salty roads.
• Titanium: This is the most expensive and lightest option. Titanium exhausts are incredibly strong and corrosion-resistant. If you're looking for the ultimate in performance and weight reduction, titanium is the way to go.

Pipe Diameter

The diameter of the exhaust piping affects the exhaust flow and sound. Larger diameter pipes generally flow better, resulting in more power. However, going too large can actually reduce low-end torque. For the IS350, a 2.25-inch or 2.5-inch diameter is usually a good choice. It provides a noticeable improvement in flow without sacrificing too much low-end power.

Muffler Design

The muffler is what determines the sound of your exhaust. Different muffler designs produce different tones and volumes. Here are a few common types:

• Chambered Mufflers: These mufflers use internal chambers to cancel out sound waves. They typically produce a deep, throaty sound.
• Straight-Through Mufflers: These mufflers have a straight path through the muffler, with minimal restriction. They produce a louder, more aggressive sound.
• Bypass Mufflers: These mufflers have a valve that opens under certain conditions, allowing exhaust gases to bypass the muffler for maximum flow and sound. They are the loudest option.

Sound Level

This is a big one. Think carefully about how loud you want your exhaust to be. Some exhausts are designed to be relatively quiet, while others are incredibly loud. Consider your driving habits and local noise ordinances. You don't want to annoy your neighbors or get pulled over by the police.

Brand Reputation

Stick with reputable brands that have a proven track record of quality and performance. Some popular brands for the IS350 include:

• Invidia
• Tanabe
• Magnaflow
• Borla
• ARK Performance

Price

Catback exhausts can range in price from a few hundred dollars to over a thousand. Set a budget and stick to it. Remember, you don't necessarily have to spend a fortune to get a good quality exhaust.

Installation

You've got your new catback exhaust – sweet! Now, how do you get it on your IS350? You've got a couple of options:

DIY Installation

If you're mechanically inclined and have some basic tools, you can install the exhaust yourself. There are plenty of online tutorials and videos that can guide you through the process. However, be aware that it can be a bit time-consuming and challenging, especially if you've never done it before. Make sure you have all the necessary tools, including a jack, jack stands, sockets, wrenches, and penetrating oil.

Professional Installation

If you're not comfortable doing it yourself, you can always take your car to a professional mechanic or exhaust shop. They'll have the experience and tools to get the job done quickly and correctly. While it will cost you more, it's often worth it for the peace of mind.

Tips for a Smooth Installation

Whether you're doing it yourself or hiring a pro, here are a few tips to make the installation process smoother:

• Soak the bolts with penetrating oil: This will make them much easier to remove, especially if they're rusty.
• Use jack stands: Never work under a car supported only by a jack.
• Follow the instructions carefully: Read the instructions that come with your exhaust system and follow them step-by-step.
• Double-check all connections: Make sure all the bolts are tightened properly to prevent leaks.
• Start the car and listen for leaks: Once you've installed the exhaust, start the car and listen for any exhaust leaks. If you hear a hissing sound, tighten the connections until the leak is gone.

Final Thoughts

Upgrading the catback exhaust on your 2007 Lexus IS350 is a fantastic way to improve its sound, performance, and appearance. By carefully considering your options and choosing the right exhaust for your needs, you can transform your driving experience and enjoy your IS350 even more. So, go ahead, do your research, and unleash the beast within your Lexus! You won't regret it.