Hey guys! So you're looking to upgrade the exhaust on your 2009 Subaru Impreza Sedan? Awesome! You've come to the right place. Choosing the right exhaust system can be a game-changer for your Impreza, boosting performance, enhancing that signature Subaru rumble, and even improving fuel efficiency. But with so many options out there, it's easy to get lost in the maze of mufflers, pipes, and catalytic converters. This guide will walk you through everything you need to know to make the best decision for your ride. Let's dive in!

Why Upgrade Your 2009 Impreza's Exhaust?

Upgrading your 2009 Impreza's exhaust system offers a multitude of benefits that go beyond just a louder, more aggressive sound. One of the primary reasons enthusiasts opt for an aftermarket exhaust is to improve engine performance. The stock exhaust systems are often designed with restrictions to minimize noise and meet emission standards, which can limit the engine's ability to breathe efficiently. By replacing it with a performance exhaust system, you're essentially allowing the engine to exhale more freely. This reduction in backpressure can lead to noticeable gains in horsepower and torque, especially in the mid to high RPM ranges. Imagine feeling that extra surge of power as you accelerate onto the highway or power through winding backroads. It’s not just about speed; it’s about a more responsive and engaging driving experience.

Another significant advantage of upgrading your 2009 Impreza's exhaust system is the potential for enhanced fuel efficiency. While it might seem counterintuitive that a performance upgrade could improve gas mileage, the principle is quite simple. When the engine can expel exhaust gases more efficiently, it requires less energy to operate. This means the engine doesn't have to work as hard, resulting in improved fuel economy. While the gains might not be dramatic, over time, they can add up, saving you money at the pump. Plus, let's be honest, who doesn't want to squeeze a few more miles out of every tank? It's a win-win situation: better performance and better fuel efficiency. This is something to consider if you are thinking about making this upgrade to your Impreza.

Of course, let's not forget about the sound. For many Subaru enthusiasts, the distinctive rumble of a well-tuned exhaust is part of the appeal of owning one of these cars. Upgrading your 2009 Impreza's exhaust system allows you to customize the sound to your liking. Whether you prefer a deep, throaty growl or a more refined, sporty tone, there's an exhaust system out there that will deliver the sound you're looking for. The sound is more than just noise; it's an expression of your car's personality and your own driving style. Choosing the right exhaust can transform your Impreza into a head-turning machine that sounds as good as it looks. It's about creating an emotional connection with your car and enjoying the driving experience to the fullest.

Beyond the performance and sound benefits, upgrading your 2009 Impreza's exhaust system can also improve the overall look of your car. Many aftermarket exhaust systems feature polished stainless steel tips or other aesthetically pleasing designs that can enhance the rear end of your Impreza. A sleek, new exhaust tip can add a touch of sportiness and sophistication to your car's appearance, making it stand out from the crowd. It's a subtle detail that can make a big difference in the overall impression your car makes. Plus, it shows that you care about the details and are willing to invest in making your car look its best.

Types of Exhaust Systems for Your 2009 Impreza

When it comes to choosing an exhaust system for your 2009 Impreza, you'll encounter a few main types, each offering different levels of performance, sound, and cost. Understanding the differences between these systems is crucial to making an informed decision that aligns with your goals and budget. Let's break down the most common types:

First up, we have Axle-Back Exhaust Systems. These are the simplest and most budget-friendly option. An axle-back system replaces the exhaust components from the rear axle to the exhaust tip. This typically includes the muffler and the exhaust tip. Axle-back systems are primarily designed to enhance the sound of your Impreza, giving it a more aggressive tone without significantly altering performance. They are relatively easy to install, often requiring only basic hand tools and a few hours of your time. If you're looking for an affordable way to improve the sound of your car without breaking the bank, an axle-back system is a great choice. Plus, they usually don't require any modifications to the existing exhaust system, making them a straightforward upgrade.

Next, we have Cat-Back Exhaust Systems. These systems replace everything from the catalytic converter back to the exhaust tip. This includes the mid-pipe, muffler, and exhaust tip. Cat-back systems offer a more significant improvement in both performance and sound compared to axle-back systems. By replacing a larger section of the exhaust system, they can reduce backpressure and improve exhaust flow, resulting in noticeable gains in horsepower and torque. Cat-back systems also provide a wider range of sound options, from mild to aggressive, depending on the specific design and materials used. Installation is a bit more involved than an axle-back system, but it's still manageable for most DIY enthusiasts. If you're looking for a balance between performance and sound, a cat-back system is an excellent option. It's a step up from an axle-back without requiring the extensive modifications of a full exhaust system.

Finally, we have Turbo-Back or Full Exhaust Systems. These are the most comprehensive and performance-oriented option. A turbo-back system replaces the entire exhaust system, from the turbocharger (if applicable) to the exhaust tip. This includes the downpipe, catalytic converter (or a high-flow catalytic converter), mid-pipe, muffler, and exhaust tip. Full exhaust systems offer the most significant gains in horsepower and torque by completely eliminating the restrictions of the stock exhaust system. They also provide the most aggressive and customizable sound options. However, turbo-back systems are the most expensive and require the most extensive modifications. Installation can be challenging and may require professional assistance. Additionally, replacing the catalytic converter may not be legal in all areas, so it's essential to check your local regulations before installing a full exhaust system. If you're serious about maximizing the performance of your Impreza and are willing to invest the time and money, a full exhaust system is the way to go. Just be sure to do your research and choose a system that meets your specific needs and goals.

Factors to Consider When Choosing an Exhaust

Okay, so you know the types of exhaust systems, but how do you narrow down your choices? A few key factors will help guide you to the perfect exhaust for your 2009 Impreza. Let's break them down:

First and foremost, consider your budget. Exhaust systems can range in price from a few hundred dollars for an axle-back system to several thousand dollars for a full turbo-back system. Determine how much you're willing to spend before you start shopping, and stick to your budget. It's easy to get carried away with all the fancy features and exotic materials, but it's essential to stay within your financial limits. Remember, there are plenty of great options available at different price points, so you don't have to break the bank to get a quality exhaust system. Setting a budget will help you narrow down your choices and focus on the systems that are within your reach.

Next up, think about your desired sound level. Do you want a loud, aggressive exhaust that will turn heads, or something more subtle and refined? Consider your personal preferences and the type of driving you do. If you primarily drive on the street, you might not want an exhaust that's too loud, as it could become annoying on long trips. On the other hand, if you frequently track your car, you might want an exhaust that's as loud and aggressive as possible to maximize performance. Research different exhaust systems and listen to sound clips online to get an idea of what they sound like in person. Keep in mind that the sound of an exhaust system can vary depending on the car and the environment, so it's always a good idea to listen to multiple examples before making a decision. Choosing the right sound level is crucial to ensuring that you're happy with your exhaust system in the long run.

Another crucial aspect to consider is the material the exhaust system is made from. Stainless steel is a popular choice due to its durability and resistance to corrosion. Aluminized steel is a more affordable option but is not as resistant to rust. Titanium is the lightest and most expensive option, offering excellent performance and durability. Stainless steel is a great option and is very durable. The material you choose will affect the longevity and performance of your exhaust system, so it's essential to weigh the pros and cons of each option before making a decision. If you live in an area with harsh weather conditions or road salt, stainless steel is probably the best choice to prevent rust and corrosion. If you're on a tight budget, aluminized steel can be a viable option, but be prepared to replace it sooner than you would a stainless steel system. Titanium is the ultimate choice for performance enthusiasts, but it comes at a premium price.

Finally, consider the installation process. Are you comfortable installing the exhaust system yourself, or will you need to take it to a professional? Some exhaust systems are easier to install than others, so factor in your skill level and the tools you have available. Axle-back systems are typically the easiest to install, while full exhaust systems can be more challenging and may require specialized tools or expertise. If you're not confident in your ability to install the exhaust system yourself, it's always best to take it to a professional to avoid any potential problems or damage. Keep in mind that professional installation can add to the overall cost of the upgrade, so factor that into your budget as well. Choosing an exhaust system that you can install yourself can save you money and give you a sense of accomplishment, but it's essential to be realistic about your abilities and the complexity of the installation process.

Top Exhaust System Brands for the 2009 Impreza

Alright, let's talk brands! Several reputable manufacturers produce high-quality exhaust systems for the 2009 Subaru Impreza. Here are a few of the top contenders:

• Invidia: Known for their high-quality construction and aggressive sound, Invidia exhaust systems are a popular choice among Subaru enthusiasts. They offer a range of options, from mild to wild, so you can find the perfect sound for your Impreza. Invidia exhausts are also known for their excellent fitment and ease of installation, making them a great choice for DIY enthusiasts. Plus, they offer a variety of styles and finishes to suit your personal taste. Whether you're looking for a subtle upgrade or a full-blown performance exhaust, Invidia has something to offer.
• Borla: Borla is a well-respected brand that's been around for a long time and is known for its quality craftsmanship and performance gains. Borla exhaust systems for the Impreza are designed to enhance both the sound and the power of your car. They offer a variety of options, including cat-back and axle-back systems, so you can choose the level of upgrade that's right for you. Borla exhausts are also known for their durability and long-lasting performance, making them a great investment for your Impreza. Plus, they offer a million-mile warranty on their stainless steel exhausts, so you can be confident in their quality and reliability.
• Magnaflow: Magnaflow offers a wide range of exhaust systems for various vehicles, including the 2009 Impreza. They are known for their smooth, deep sound and performance improvements. Magnaflow exhaust systems are designed to optimize exhaust flow and reduce backpressure, resulting in noticeable gains in horsepower and torque. They also offer a variety of styles and finishes to suit your personal taste. Magnaflow exhausts are a great choice for those who want a performance upgrade without sacrificing sound quality or comfort.
• Nameless Performance: Nameless Performance is a smaller company that specializes in Subaru exhausts. They are known for their customizable options and high-quality materials. Nameless Performance exhaust systems are designed to be modular, so you can mix and match different components to create the perfect sound and performance for your Impreza. They also offer a variety of finishes and tip styles to choose from. Nameless Performance is a great choice for those who want a unique and personalized exhaust system that stands out from the crowd.

Installation Tips

So, you've chosen your new exhaust system! Now what? Here are a few tips to make the installation process smoother:

• Gather the Right Tools: Make sure you have all the necessary tools before you start, including wrenches, sockets, a ratchet, penetrating oil, and a jack with jack stands. Having the right tools on hand will save you time and frustration during the installation process. It's also a good idea to have a torque wrench to ensure that you tighten the bolts to the correct specifications. If you're not sure what tools you need, consult the installation instructions or ask a professional.
• Use Penetrating Oil: Spray all the bolts and nuts with penetrating oil a day or two before you plan to start the installation. This will help loosen them up and make them easier to remove. Stubborn bolts can be a major headache, so it's always a good idea to take this extra step to prevent them from breaking or stripping. Apply the penetrating oil liberally and let it soak in for as long as possible. You can also use a wire brush to clean off any rust or corrosion that may be preventing the oil from penetrating.
• Follow the Instructions: Read the installation instructions carefully before you start, and follow them step by step. This will help you avoid any mistakes and ensure that the exhaust system is installed correctly. The installation instructions will provide you with detailed information on how to remove the old exhaust system and install the new one, as well as any specific torque specifications or other important details. If you're not sure about something, don't hesitate to ask a professional for help.
• Use Jack Stands: Never work under a car that is only supported by a jack. Always use jack stands to support the car safely. Jack stands are an essential safety item that will prevent the car from falling on you while you're working underneath it. Make sure the jack stands are placed on a solid, level surface and that they are properly rated to support the weight of your car. It's also a good idea to use wheel chocks to prevent the car from rolling.

Final Thoughts

Upgrading your 2009 Subaru Impreza's exhaust system is a fantastic way to enhance performance, improve sound, and add a touch of personal style to your ride. By considering your budget, desired sound level, material preferences, and installation skills, you can find the perfect exhaust system to meet your needs. Remember to research different brands and read reviews to make an informed decision. With the right exhaust system, you'll be cruising in style and enjoying that signature Subaru rumble for years to come. Happy modding!