Upgrading your Subaru Forester SJ's exhaust system is a popular modification, and for good reason! An aftermarket exhaust can boost performance, improve fuel efficiency, and give your Forester a more aggressive sound. But with so many options available, how do you choose the right one? This guide dives deep into the world of Subaru Forester SJ exhaust systems to help you make an informed decision.

Why Upgrade Your Subaru Forester SJ Exhaust?

Before we dive into specific exhaust systems, let's discuss why you might want to upgrade in the first place. Several benefits can come from replacing your factory exhaust:

• Performance Enhancement: The stock exhaust systems are often designed to be quiet and restrictive, hindering the engine's ability to breathe efficiently. An aftermarket exhaust typically features larger diameter piping and less restrictive mufflers, allowing exhaust gases to flow more freely. This can result in noticeable gains in horsepower and torque, particularly in the mid-range and top-end.
• Improved Fuel Efficiency: While performance gains are a major draw, a less restrictive exhaust can also improve fuel economy. When the engine doesn't have to work as hard to expel exhaust gases, it operates more efficiently, potentially leading to better MPG.
• Enhanced Sound: Let's face it, the stock exhaust sound on the Forester SJ is pretty tame. A new exhaust system can give your SUV a more aggressive and sporty tone. Whether you prefer a deep rumble or a more pronounced growl, there's an exhaust system out there to suit your taste.
• Aesthetic Appeal: Many aftermarket exhaust systems feature polished stainless steel tips or other visual enhancements that can improve the overall look of your Forester.
• Weight Reduction: Some aftermarket exhaust systems are made from lighter materials like stainless steel or titanium, which can reduce the overall weight of your vehicle, further improving performance.

Types of Subaru Forester SJ Exhaust Systems

Now that you know the benefits, let's explore the different types of exhaust systems available for your Forester SJ:

• Cat-Back Systems: These systems replace everything from the catalytic converter back to the exhaust tips. Cat-back systems are a popular choice because they offer a good balance of performance, sound, and affordability. They're also relatively easy to install.
• Axle-Back Systems: Axle-back systems are the most basic type of exhaust upgrade, replacing only the muffler and exhaust tips. They're generally the least expensive option and primarily focus on improving the sound of your exhaust. Performance gains are typically minimal with axle-back systems.
• Header-Back Systems (Turbo-Back for Turbo Models): These are the most comprehensive exhaust upgrades, replacing everything from the exhaust manifold (or turbocharger) to the exhaust tips. Header-back systems offer the greatest potential for performance gains but are also the most expensive and require more extensive installation. They are a great choice for a fully optimized performance build. Replacing the headers requires a professional install due to the increased complexity.
• Full Exhaust Systems: These replace the entire exhaust system from the engine to the tailpipe. This includes the headers, catalytic converter, and muffler. A full exhaust system offers the most significant performance gains, but it is also the most expensive option.

Choosing the Right Exhaust System: Factors to Consider

Selecting the perfect exhaust system for your Subaru Forester SJ involves considering several factors:

• Budget: Exhaust systems range in price from a few hundred dollars for an axle-back system to over a thousand dollars for a full header-back system. Determine your budget beforehand to narrow your options.
• Desired Sound Level: Exhaust systems vary in sound level, from mild to aggressive. Consider your personal preference and local noise regulations when choosing an exhaust. Do you want a subtle rumble, or do you want to announce your arrival?
• Performance Goals: Are you primarily interested in increasing horsepower and torque, or are you simply looking for a better sound? Your performance goals will help determine the type of exhaust system you need. If you just want a bit more sound, the axle-back system is a good option. For maximum gains, start with a turbo-back system if you have a turbo.
• Installation: Some exhaust systems are easier to install than others. If you're comfortable working on cars, you may be able to install a cat-back or axle-back system yourself. However, header-back systems often require professional installation.
• Emissions Regulations: Be sure to check your local emissions regulations before purchasing an exhaust system. Some aftermarket exhausts may not be legal for street use in certain areas.
• Material: Exhaust systems are typically made from either aluminized steel or stainless steel. Stainless steel is more durable and resistant to corrosion, but it's also more expensive. Aluminized steel is a more affordable option, but it may not last as long.
• Pipe Diameter: A larger diameter pipe will allow for greater exhaust flow, resulting in more horsepower and torque. However, a pipe that is too large can actually decrease performance by reducing backpressure. Consult with a professional to determine the optimal pipe diameter for your Forester SJ.

Top Exhaust System Brands for Subaru Forester SJ

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

• Invidia: Invidia is known for producing high-performance exhaust systems with excellent sound quality. They offer a variety of options for the Forester SJ, including cat-back and axle-back systems. Their systems are a very popular choice among Subaru enthusiasts. Known for both quality and sound, Invidia is a safe bet when upgrading your exhaust.
• Nameless Performance: Nameless Performance offers custom-built exhaust systems for a variety of vehicles, including the Subaru Forester SJ. They allow you to choose the muffler style, tip style, and even the sound level of your exhaust.
• Borla: Borla is a well-known brand in the exhaust industry, producing high-quality systems for a wide range of vehicles. They offer both cat-back and axle-back systems for the Forester SJ, known for their durability and performance gains.
• MagnaFlow: MagnaFlow is another popular brand that offers a variety of exhaust systems for the Forester SJ. They are known for their smooth, deep sound and their high-quality construction. They are generally more affordable than some of the other brands listed.
• Remark: Remark offers affordable and well-designed exhaust systems, focusing on providing quality sound improvements without breaking the bank. They're a great option if you're on a budget but still want a noticeable upgrade.

Installation Tips

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

• Gather the Necessary Tools: Make sure you have all the tools you need before you start, including wrenches, sockets, a ratchet, a jack, jack stands, and penetrating oil.
• Spray Penetrating Oil: Spray penetrating oil on all the bolts and fasteners that you'll be removing. This will help loosen them up and prevent them from breaking.
• Use Jack Stands: Never work under a vehicle that is only supported by a jack. Always use jack stands to support the vehicle safely.
• Follow the Instructions: Carefully follow the instructions that come with your new exhaust system. If you're not sure about something, consult a professional.
• Wear Safety Glasses: Protect your eyes from debris by wearing safety glasses.
• Consider a Professional: If you are uncomfortable doing the work yourself, take it to a professional. Exhaust work can sometimes be difficult, and it is always better to be safe than sorry.

Maintaining Your New Exhaust System

To keep your new exhaust system in good condition, here are a few maintenance tips:

• Inspect Regularly: Regularly inspect your exhaust system for signs of damage or corrosion.
• Clean Regularly: Clean your exhaust tips regularly with a stainless steel cleaner to keep them looking their best.
• Address Leaks Promptly: If you notice any exhaust leaks, have them repaired immediately.
• Avoid Harsh Chemicals: Avoid using harsh chemicals or abrasive cleaners on your exhaust system.

Conclusion

Upgrading your Subaru Forester SJ exhaust system is a worthwhile investment that can improve performance, fuel efficiency, and sound. By considering the factors discussed in this guide, you can choose the right exhaust system for your needs and enjoy the benefits for years to come. Remember to factor in your budget, desired sound level, performance goals, and local emissions regulations. With the right exhaust system, you can transform your Forester SJ into a more enjoyable and exciting vehicle to drive. Whether you are looking for a subtle rumble or an aggressive growl, there is an exhaust system for you!