Hey guys! Upgrading your 2011 Subaru Legacy's exhaust system can seriously boost its performance, sound, and even its looks. But with so many options out there, it’s easy to get overwhelmed. Let's dive into everything you need to know to make the best choice for your ride.

Why Upgrade Your Exhaust System?

Before we get into the specifics, let's talk about why you might want to upgrade your exhaust system in the first place. The stock exhaust system on your 2011 Subaru Legacy, like most factory systems, is designed with cost-effectiveness and noise reduction in mind. This often means it's not the most efficient when it comes to performance.

Increased Performance: An aftermarket exhaust system typically features larger diameter piping and less restrictive mufflers and resonators. This allows exhaust gases to flow more freely, reducing backpressure on the engine. Less backpressure means the engine doesn't have to work as hard to expel exhaust, which translates to more horsepower and torque. For the 2011 Subaru Legacy, this can result in a noticeable improvement in acceleration and overall responsiveness.

Enhanced Sound: Let’s be real – who doesn’t love a good-sounding exhaust? Upgrading your exhaust system can give your 2011 Subaru Legacy a deeper, more aggressive tone. Whether you're looking for a subtle rumble or a full-on roar, there's an exhaust system out there that can deliver the sound you want. Just be mindful of local noise regulations!

Improved Aesthetics: Many aftermarket exhaust systems come with polished tips and a more aggressive look than the factory exhaust. This can add a sporty touch to the rear of your 2011 Subaru Legacy, enhancing its overall appearance. Plus, a clean, new exhaust system just looks better than a rusty, old one.

Better Fuel Efficiency: While it's not the primary reason most people upgrade their exhaust, a less restrictive system can sometimes lead to improved fuel efficiency. By allowing the engine to breathe easier, it may consume less fuel, especially during highway driving. However, this benefit is usually marginal and depends on your driving habits.

Types of Exhaust Systems for Your 2011 Subaru Legacy

When it comes to upgrading your exhaust, you've got a few different options to choose from. Each type offers its own set of benefits and drawbacks, so it's important to understand the differences.

Cat-Back Systems

A cat-back system replaces everything from the catalytic converter back to the exhaust tip. This typically includes the mid-pipe, muffler, and tailpipe. Cat-back systems are a popular choice for several reasons:

Easy Installation: Cat-back systems are generally designed to bolt directly onto the existing catalytic converter, making installation relatively straightforward. Most experienced DIYers can install a cat-back system in their garage with basic tools.

Noticeable Performance Gains: By replacing the restrictive factory muffler and mid-pipe, a cat-back system can significantly improve exhaust flow, resulting in noticeable gains in horsepower and torque. You'll likely feel the difference when accelerating.

Improved Sound: Cat-back systems offer a wide range of sound options, from mild to aggressive. You can choose a muffler that provides a deep, throaty tone without being overly loud or obnoxious. This allows you to customize the sound of your 2011 Subaru Legacy to your liking.

Cost-Effective: Compared to other exhaust upgrades, cat-back systems are relatively affordable. They offer a good balance of performance, sound, and value, making them a popular choice for many car enthusiasts.

Axle-Back Systems

An axle-back system is a more modest upgrade that replaces only the muffler and tailpipe, from the rear axle to the exhaust tip. Axle-back systems are a good option if you're primarily looking to improve the sound and appearance of your exhaust without making significant changes to performance.

Simple Installation: Axle-back systems are even easier to install than cat-back systems. They typically bolt directly onto the existing exhaust piping behind the rear axle, making installation a breeze. This is a great option for DIYers who want a quick and easy upgrade.

Enhanced Sound: While axle-back systems don't offer the same performance gains as cat-back systems, they can still significantly improve the sound of your exhaust. You can choose a muffler that provides a deeper, more aggressive tone without being overly loud.

Improved Appearance: Many axle-back systems come with polished exhaust tips that can enhance the appearance of your 2011 Subaru Legacy. This is a great way to add a sporty touch to the rear of your car without breaking the bank.

Affordable: Axle-back systems are generally the most affordable exhaust upgrade option. They're a great choice for those who want to improve the sound and appearance of their exhaust without spending a lot of money.

Full Exhaust Systems (Headers-Back)

A full exhaust system, also known as a headers-back system, replaces everything from the exhaust manifold (headers) to the exhaust tip. This is the most comprehensive exhaust upgrade option, offering the greatest potential for performance gains.

Maximum Performance Gains: By replacing the restrictive factory headers with high-flow aftermarket headers, a full exhaust system can significantly improve exhaust flow, resulting in substantial gains in horsepower and torque. This is the best option for those who want to maximize the performance of their 2011 Subaru Legacy.

Aggressive Sound: Full exhaust systems typically offer the most aggressive sound of all exhaust upgrade options. This is because they replace the restrictive factory headers with high-flow aftermarket headers, which allow for a much louder and more aggressive exhaust note. Be prepared for a significant increase in volume!

Complex Installation: Installing a full exhaust system is more complex than installing a cat-back or axle-back system. It requires removing the factory headers, which can be a difficult and time-consuming process. Professional installation is often recommended.

Expensive: Full exhaust systems are generally the most expensive exhaust upgrade option. This is because they include high-quality aftermarket headers, which can be quite costly. However, the performance gains can be well worth the investment for serious enthusiasts.

Factors to Consider When Choosing an Exhaust System

Choosing the right exhaust system for your 2011 Subaru Legacy involves considering several factors to ensure you get the best fit for your needs and budget. Here are some key things to keep in mind:

Sound Level

The sound level of your exhaust system is a crucial consideration. Do you want a subtle rumble or a loud roar? Keep in mind that some exhaust systems can be quite loud, which may not be ideal for daily driving or if you live in an area with strict noise regulations. Check online forums and listen to sound clips to get an idea of how different exhaust systems sound before making a decision.

Performance Goals

What are your performance goals? Are you primarily looking to improve the sound and appearance of your exhaust, or are you looking for significant gains in horsepower and torque? If you're after maximum performance, a full exhaust system is the way to go. If you're primarily concerned with sound and appearance, an axle-back or cat-back system may be sufficient.

Budget

Exhaust systems can range in price from a few hundred dollars to several thousand dollars. Determine your budget before you start shopping to narrow down your options. Keep in mind that the cost of installation can also vary depending on the complexity of the system and whether you choose to install it yourself or have it professionally installed.

Material

Exhaust systems are typically made from either aluminized steel or stainless steel. Stainless steel is more durable and resistant to rust and corrosion, making it a better choice for those who live in areas with harsh weather conditions. However, stainless steel exhaust systems are typically more expensive than aluminized steel systems.

Brand Reputation

Choose an exhaust system from a reputable brand with a proven track record of quality and performance. Read online reviews and ask for recommendations from other 2011 Subaru Legacy owners to get an idea of which brands are the most reliable.

Installation

Consider the installation process before making a decision. Are you comfortable installing the exhaust system yourself, or will you need to have it professionally installed? Cat-back and axle-back systems are generally easier to install than full exhaust systems. If you're not comfortable working on your car, it's best to have the exhaust system professionally installed.

Popular Exhaust System Brands for the 2011 Subaru Legacy

Several reputable brands offer high-quality exhaust systems for the 2011 Subaru Legacy. Here are a few of the most popular:

Invidia: Invidia is known for producing high-quality exhaust systems that offer a good balance of performance and sound. Their exhaust systems are popular among Subaru enthusiasts.

MagnaFlow: MagnaFlow is a well-known brand that offers a wide range of exhaust systems for various makes and models. Their exhaust systems are known for their quality construction and performance gains.

Borla: Borla is another popular brand that specializes in performance exhaust systems. Their exhaust systems are known for their aggressive sound and high-quality materials.

Nameless Performance: Nameless Performance offers custom-built exhaust systems for a variety of vehicles, including the 2011 Subaru Legacy. They are known for their high-quality craftsmanship and attention to detail.

Installation Tips

If you decide to install the exhaust system yourself, here are a few tips to keep in mind:

Gather the necessary tools: Make sure you have all the necessary tools before you start the installation process. This may include wrenches, sockets, a ratchet, a jack, jack stands, and penetrating oil.

Read the instructions carefully: Read the installation instructions carefully before you start working on your car. This will help you avoid making mistakes and ensure that the exhaust system is installed correctly.

Use penetrating oil: Use penetrating oil to loosen any rusty bolts or fasteners. This will make it easier to remove them without damaging them.

Support the exhaust system: Use jack stands to support the exhaust system while you're working on it. This will prevent it from falling and causing injury.

Tighten all connections: Make sure to tighten all connections securely to prevent exhaust leaks.

Final Thoughts

Upgrading your 2011 Subaru Legacy's exhaust system is a fantastic way to improve its performance, sound, and appearance. By understanding the different types of exhaust systems available and considering factors like sound level, performance goals, budget, and material, you can choose the perfect exhaust system for your needs. Happy driving!