So, you're thinking about beefing up your 2007 Subaru Impreza WRX with a new exhaust system, huh? Awesome choice! A fresh exhaust can seriously transform your ride, not just in terms of power but also that sweet, sweet rumble we all crave. But before you dive in headfirst, let's break down everything you need to know to make the right choice. We're talking about performance gains, sound profiles, different types of exhausts, and, of course, making sure it all fits your budget. Consider this your ultimate guide to upgrading the exhaust on your 2007 WRX.

Why Upgrade Your WRX Exhaust?

Let's get straight to the point: why even bother upgrading your exhaust? For starters, the stock exhaust on the 2007 WRX, while decent, is designed with certain restrictions to meet emissions standards and keep noise levels down. This means it's not exactly optimized for peak performance. By upgrading, you're essentially unshackling your engine, allowing it to breathe more freely.

Improved Performance: One of the most significant benefits is a noticeable bump in horsepower and torque. A less restrictive exhaust system allows exhaust gases to exit the engine more efficiently, reducing backpressure and freeing up power. You'll feel it, trust me.

Enhanced Sound: Let's be real, who doesn't love that deep, throaty growl? An aftermarket exhaust can give your WRX a much more aggressive and sporty sound, turning heads wherever you go. Just be mindful of noise regulations in your area!

Aesthetic Appeal: Many aftermarket exhausts come with stylish tips and finishes that can enhance the overall look of your car. It's a small detail, but it can make a big difference.

Weight Reduction: Some aftermarket exhausts are made from lighter materials like stainless steel or titanium, which can reduce the overall weight of your car. This can improve handling and acceleration, even if only slightly.

Types of Exhaust Systems for Your 2007 WRX

Alright, so you're sold on the idea of an upgrade. Now, let's talk about the different types of exhaust systems you can choose from. Each type offers its own unique blend of performance, sound, and price.

Cat-Back Exhaust Systems

A cat-back system replaces everything from the catalytic converter to the exhaust tip. This is generally the most popular option for several reasons:

Easy Installation: Cat-back systems are relatively easy to install, often requiring only basic tools and mechanical knowledge. Most kits are designed to bolt directly onto the existing hangers and connections.

Balanced Performance: You'll see a noticeable improvement in performance, but it won't be as dramatic as a full turbo-back system. However, it's a great balance for daily driving and occasional spirited runs.

Moderate Sound: Cat-back systems typically offer a more aggressive sound than stock, but they're not overly loud or obnoxious. This makes them a good choice if you want to enhance the sound of your WRX without attracting too much attention.

Turbo-Back Exhaust Systems

A turbo-back system replaces everything from the turbocharger to the exhaust tip. This is the most comprehensive upgrade and offers the most significant performance gains.

Maximum Performance: By removing the restrictive factory downpipe, a turbo-back system allows for maximum exhaust flow, resulting in a substantial increase in horsepower and torque. This is the go-to option for those seeking serious performance.

Aggressive Sound: Turbo-back systems are generally the loudest option, delivering a deep, throaty rumble that will definitely turn heads. Be prepared for a more pronounced exhaust note, especially under acceleration.

More Complex Installation: Installing a turbo-back system can be more challenging than a cat-back system, often requiring more specialized tools and knowledge. You may also need to tune your ECU to take full advantage of the increased airflow.

Axle-Back Exhaust Systems

An axle-back system replaces only the portion of the exhaust system from the rear axle to the exhaust tip. This is the simplest and most affordable option.

Easy Installation: Axle-back systems are incredibly easy to install, often requiring only a few basic tools. It's a great DIY project for beginners.

Minimal Performance Gains: While you might notice a slight improvement in throttle response, axle-back systems primarily focus on enhancing the sound of your exhaust. Performance gains are minimal.

Enhanced Sound: Axle-back systems offer a noticeable improvement in sound, giving your WRX a sportier and more aggressive tone. However, the sound change is less dramatic than with cat-back or turbo-back systems.

Key Considerations Before Buying

Before you pull the trigger on a new exhaust, there are a few key things to consider. These factors will help you narrow down your choices and ensure you're making the right decision for your needs and budget.

Budget: Exhaust systems can range in price from a few hundred dollars to over a thousand, so it's important to set a budget before you start shopping. Consider the cost of the exhaust itself, as well as any additional parts or labor required for installation.

Performance Goals: What are you hoping to achieve with your new exhaust? Are you looking for maximum power gains, or are you primarily interested in improving the sound of your car? Your performance goals will help you determine which type of exhaust system is right for you.

Sound Preference: Exhaust sound is subjective, so it's important to listen to sound clips and read reviews to get an idea of how a particular exhaust will sound on your WRX. Consider whether you prefer a deep, throaty rumble or a more high-pitched, raspy tone.

Local Laws and Regulations: Be sure to check your local laws and regulations regarding exhaust noise levels. Some areas have strict limits on how loud your exhaust can be, and you don't want to get a ticket.

Installation: Are you planning to install the exhaust yourself, or will you be taking it to a professional? Consider your skill level and the tools required for installation. If you're not comfortable working on your car, it's best to leave it to the pros.

Top Exhaust Brands for the 2007 WRX

When it comes to exhaust systems, there are a few brands that consistently stand out for their quality, performance, and sound. Here are some of the top brands to consider for your 2007 WRX:

Invidia: Invidia is a well-known brand in the Subaru community, offering a wide range of exhaust systems for the WRX. Their exhausts are known for their quality construction, excellent fitment, and aggressive sound.

COBB Tuning: COBB Tuning is another popular brand that specializes in Subaru performance parts. Their exhausts are designed to maximize performance and sound, and they're often paired with COBB's Accessport ECU tuning device.

Injen: Injen is a reputable brand that offers a variety of exhaust systems for different makes and models. Their WRX exhausts are known for their quality construction, performance gains, and sporty sound.

Borla: Borla is a well-established brand that has been producing high-quality exhaust systems for decades. Their WRX exhausts are known for their refined sound, excellent fitment, and durable construction.

Installation Tips and Tricks

So, you've picked out your exhaust and you're ready to get wrenching. Here are a few tips and tricks to make the installation process smoother:

Gather Your Tools: Make sure you have all the necessary tools before you start, including sockets, wrenches, a torque wrench, penetrating oil, and jack stands.

Soak the Bolts: Spray the exhaust bolts with penetrating oil a few hours before you start working. This will help loosen them and prevent them from breaking.

Use Jack Stands: Never work under a car supported only by a jack. Use jack stands to safely support the car.

Follow the Instructions: Read the installation instructions carefully before you start. This will help you avoid mistakes and ensure that you install the exhaust correctly.

Torque to Spec: Use a torque wrench to tighten all bolts to the manufacturer's specifications. This will prevent leaks and ensure that the exhaust system is properly secured.

Check for Leaks: After you've installed the exhaust, start the car and check for any exhaust leaks. If you find any leaks, tighten the connections until they're sealed.

Maintaining Your New Exhaust

Once you've installed your new exhaust, it's important to maintain it properly to ensure it lasts for years to come. Here are a few tips:

Regular Cleaning: Clean your exhaust system regularly to remove dirt, grime, and road salt. This will help prevent corrosion and keep it looking its best.

Inspect for Damage: Periodically inspect your exhaust system for any signs of damage, such as cracks, dents, or rust. Repair any damage promptly to prevent further deterioration.

Tighten Connections: Check the exhaust connections periodically to ensure they're still tight. Loose connections can cause leaks and reduce performance.

Conclusion

Upgrading the exhaust on your 2007 Subaru Impreza WRX is a fantastic way to improve performance, enhance sound, and add a touch of style to your ride. By understanding the different types of exhaust systems available, considering your budget and performance goals, and following these tips and tricks, you can make the right choice and enjoy the benefits of a new exhaust for years to come. So, go ahead and unleash the beast within your WRX! You won't regret it.