2007 Subaru Impreza WRX Exhaust: Upgrade Guide

Hey Subaru enthusiasts! If you're looking to boost the performance and sound of your 2007 Subaru Impreza WRX, upgrading the exhaust system is a fantastic place to start. This guide will walk you through everything you need to know about selecting and installing the perfect exhaust for your ride. Let's dive in!

Why Upgrade Your 2007 WRX Exhaust?

Upgrading your exhaust system on a 2007 Subaru Impreza WRX can bring a host of benefits that any car enthusiast would appreciate. Improved performance is often the primary reason, as aftermarket exhausts are designed to reduce backpressure, allowing the engine to breathe more freely. This can result in noticeable gains in horsepower and torque. Think of it like this: a less restrictive exhaust system lets your engine expel exhaust gases more efficiently, leading to a more powerful and responsive driving experience. Plus, who doesn't want a little extra oomph when they hit the gas pedal?

Beyond performance, the enhanced sound is another major draw. The stock exhaust on the 2007 WRX is fairly muted, leaving many drivers wanting more of that classic Subaru rumble. An aftermarket exhaust can provide a deeper, more aggressive tone that announces your presence on the road. Just imagine cruising down the street, the distinctive burble of your WRX exhaust turning heads and making a statement. For many, the sound alone is worth the upgrade. Then there's the aesthetic appeal. Many aftermarket exhaust systems come with polished tips and mandrel-bent tubing that can significantly improve the look of your car's rear end. A shiny new exhaust system can add a touch of style and sophistication, making your WRX stand out from the crowd. Whether you're going for a subtle upgrade or a more aggressive look, the right exhaust can enhance your car's overall appearance. Finally, consider the potential increase in fuel efficiency. While it might not be the primary reason for upgrading, a less restrictive exhaust can sometimes lead to slight improvements in fuel economy. By allowing the engine to operate more efficiently, you might see a small but welcome increase in miles per gallon. It's like getting a little bonus for making your car sound and perform better.

Types of Exhaust Systems for Your 2007 WRX

When it comes to upgrading your 2007 WRX exhaust, you've got a few different options to consider. Each type offers its own set of benefits and characteristics, so let's break them down.

Cat-Back Exhaust Systems

Cat-back systems are among the most popular choices for WRX owners. As the name suggests, these systems replace everything from the catalytic converter back to the exhaust tips. This typically includes the mid-pipe and the muffler. Cat-back systems are generally easier to install than full turbo-back systems because they don't require modifications to the downpipe or catalytic converter. They offer a good balance of performance gains, improved sound, and relatively straightforward installation.

One of the main advantages of a cat-back system is the enhanced exhaust note. You'll get a deeper, more aggressive sound without being excessively loud. This is a great option for those who want a more noticeable exhaust tone without attracting too much attention. Additionally, cat-back systems can provide a modest increase in horsepower and torque, thanks to the reduced backpressure. Installation is typically a bolt-on affair, meaning you won't need to do any welding or cutting. This makes it a great option for DIYers who want to tackle the upgrade themselves. Cat-back systems come in a variety of configurations and materials, allowing you to choose the one that best fits your budget and preferences. Whether you're looking for stainless steel construction for durability or a specific tip design to match your car's style, there's a cat-back system out there for you. Overall, a cat-back system is a well-rounded upgrade that offers a noticeable improvement in sound and performance without breaking the bank.

Axle-Back Exhaust Systems

Axle-back systems are a more budget-friendly option. They replace only the muffler and the exhaust tips, leaving the rest of the exhaust system intact. Axle-back exhausts are the easiest to install, often requiring just a few simple tools. While they don't offer the same performance gains as cat-back or turbo-back systems, they can significantly improve the sound of your WRX.

The primary benefit of an axle-back system is the enhanced exhaust note. You'll get a deeper, more aggressive sound that can make your WRX sound much more exciting. This is a great option for those who want to improve the sound without spending a lot of money or doing extensive modifications. Installation is usually very straightforward, often involving just a few bolts. This makes it a perfect choice for DIYers who are new to car modifications. Axle-back systems are available in a variety of styles and materials, allowing you to customize the look of your exhaust tips. Whether you prefer a subtle, understated look or a bold, aggressive design, you can find an axle-back system that suits your taste. Keep in mind that because axle-back systems only replace the muffler, the performance gains will be minimal. However, if you're primarily concerned with improving the sound of your WRX, an axle-back system can be a great option. It's an affordable and easy way to add some excitement to your driving experience.

Turbo-Back Exhaust Systems

For those seeking maximum performance gains, a turbo-back system is the way to go. These systems replace the entire exhaust system, from the turbocharger all the way to the exhaust tips. Turbo-back systems typically include a downpipe, mid-pipe, and muffler. Upgrading to a turbo-back system can significantly reduce backpressure and improve exhaust flow, resulting in substantial increases in horsepower and torque. However, they are generally more expensive and require more extensive installation.

The main advantage of a turbo-back system is the significant performance improvement. By removing the restrictive stock exhaust components, you'll allow your engine to breathe much more freely. This can lead to noticeable gains in power and responsiveness, especially when combined with other modifications like a tune. Turbo-back systems also provide a more aggressive exhaust note. You'll get a deep, throaty sound that announces your car's presence on the road. This is a great option for those who want their WRX to sound as powerful as it performs. Installation can be more complex, often requiring professional help. The downpipe, in particular, can be difficult to access and may require some modifications to fit properly. Turbo-back systems are available in a variety of materials, with stainless steel being the most popular choice due to its durability and resistance to corrosion. If you're serious about maximizing the performance of your WRX and don't mind spending a bit more money and effort, a turbo-back system is the ultimate upgrade. Just be sure to check local regulations regarding emissions, as some turbo-back systems may not be street legal.

Key Considerations When Choosing an Exhaust

Choosing the right exhaust system for your 2007 WRX involves more than just picking the loudest or the flashiest option. Several factors can influence your decision, ensuring you get the best possible upgrade for your specific needs and preferences. Consider these key points to make an informed choice.

First, think about your budget. Exhaust systems can range from a few hundred dollars for a basic axle-back system to over a thousand dollars for a full turbo-back setup. Determine how much you're willing to spend before you start shopping. This will help you narrow down your options and avoid overspending. Keep in mind that the cost of installation can also vary depending on the complexity of the system and whether you choose to do it yourself or hire a professional. Next, consider the sound level and tone you're after. Some exhaust systems are designed to be loud and aggressive, while others offer a more subtle and refined sound. Listen to sound clips or, if possible, hear the exhaust in person before making a decision. Pay attention to the tone as well – do you prefer a deep rumble or a higher-pitched rasp? Your personal preference will play a big role in determining the right exhaust for you. Also, think about the performance gains you're hoping to achieve. If you're primarily interested in improving the sound of your WRX, an axle-back or cat-back system may be sufficient. However, if you're looking for significant horsepower and torque gains, a turbo-back system is the way to go. Keep in mind that the performance gains will also depend on other modifications you've made to your car. A well-tuned engine with supporting mods will benefit more from an upgraded exhaust than a stock engine. Don't forget to check local emissions regulations. Some exhaust systems, particularly those that remove or modify the catalytic converter, may not be street legal in your area. Be sure to research the regulations in your state or province before purchasing an exhaust system. You don't want to end up with a system that you can't legally use on public roads. Finally, consider the material and build quality of the exhaust system. Stainless steel is a popular choice due to its durability and resistance to corrosion. Look for systems with mandrel-bent tubing, which provides smoother exhaust flow than crush-bent tubing. Pay attention to the quality of the welds and the overall fit and finish of the system. A well-built exhaust system will last longer and perform better than a cheaply made one. By considering these factors, you can choose an exhaust system that meets your needs, fits your budget, and enhances your driving experience.

Installation Tips

Installing a new exhaust system on your 2007 WRX can be a rewarding DIY project. However, it's essential to approach the task with the right knowledge and tools to ensure a smooth and successful installation. Follow these tips to make the process easier and avoid common pitfalls.

First, gather all the necessary tools before you start. You'll typically need a socket set, wrenches, penetrating oil, a jack and jack stands, and possibly a rubber mallet. Having everything on hand will save you time and frustration. Make sure you have the correct size sockets and wrenches for the bolts and nuts on your exhaust system. Apply penetrating oil to any rusty or stubborn bolts. This will help loosen them and prevent them from breaking. Let the oil soak in for at least 15-20 minutes before attempting to remove the bolts. If a bolt is particularly stubborn, try using a breaker bar or a hammer to gently tap the wrench. Use jack stands to safely support your car. Never work under a car that is only supported by a jack. Place the jack stands on a solid, level surface and ensure they are securely positioned before getting under the car. Disconnect the negative battery terminal to prevent any electrical issues. This is a simple but important safety precaution that can protect you and your car. Support the exhaust system while you're removing the bolts. Exhaust systems can be heavy, and you don't want them to fall and cause damage or injury. Use a jack or a strap to hold the exhaust in place as you remove the mounting bolts. When installing the new exhaust system, start by loosely attaching all the components. This will allow you to make adjustments and ensure that everything lines up properly. Once you're satisfied with the fit, tighten all the bolts to the manufacturer's specifications. Use new gaskets and hardware whenever possible. This will help ensure a tight seal and prevent leaks. Torque the bolts to the correct specifications to avoid over-tightening or under-tightening them. After the installation is complete, double-check all the connections and make sure everything is secure. Start the engine and listen for any exhaust leaks. If you hear any leaks, tighten the connections until the leaks are gone. Finally, take your car for a test drive and enjoy your new exhaust system. Pay attention to the sound and performance of the exhaust and make any necessary adjustments. By following these tips, you can successfully install a new exhaust system on your 2007 WRX and enjoy the benefits of improved sound and performance.

Conclusion

Upgrading your 2007 Subaru Impreza WRX exhaust is a fantastic way to enhance both its performance and sound. Whether you opt for a cat-back, axle-back, or turbo-back system, make sure to consider your budget, desired sound level, and performance goals. With the right exhaust and a little elbow grease, you'll have your WRX sounding and performing its best in no time. Happy modding!