Subaru wrx exhaust

Types of Subaru WRX exhaust

There are many different types of Subaru car exhaust systems. Each exhaust system has its own set of advantages, and they produce different sound profiles. Some common types of Subaru WRX exhaust are as follows.

• Cat-back exhaust

  Cat-back exhaust systems are the most common type of exhaust system. These exhaust systems are loved because of the easy installation process. The systems extend from the catalytic converter to the rear of the vehicle. They also improve airflow, which increases horsepower and torque. Besides, they produce a more aggressive sound compared to stock exhaust systems. Car enthusiasts love the cat-back exhaust of Subarus because of the deep and aggressive sound they produce. For instance, a 2021 Subaru WRX exhaust will produce a more aggressive sound when a cat-back system is installed. The system comes in a variety of styles, including single and dual exits, and can be made from stainless steel or aluminized steel.

• Axle-back exhaust

  An axle-back exhaust system is installed at the rear section of the car, just ahead of the rear axle. The exhaust system components include the muffler and the pipes leading up to the exhaust tips. The axle-back exhaust system replaces the stock muffler. An axle-back exhaust system is the best option for those looking to improve the sound of their Subaru without major modifications. The system has a simple and affordable installation. The axle-back exhaust system does little to improve the performance of the vehicle.

• Downpipe

  The downpipe is a crucial component of the WRX exhaust. It connects the exhaust manifold or the turbocharger to the rest of the exhaust system. The downpipe plays an important role in directing exhaust gases from the turbocharger to the mid-pipe. Modified downpipes increase the diameter to allow for better flow of exhaust gases. This helps to reduce turbo lag and increases horsepower. Aftermarket downpipes come in two types: catted and catless. Catted downpipes have a catalytic converter, while catless downpipes do not have a catalytic converter. The sound produced by a downpipe is often described as a deep, throaty tone, with some even describing it as a gurgling or bubbling sound, especially when paired with an aftermarket exhaust.

• Header

  The stock header of a Subaru has a complex design with a lot of bends. The header is located at the front of the exhaust system, right next to the engine. It collects exhaust gases from the engine's cylinders and directs them into the downpipe. Upgrading to aftermarket headers improves airflow by reducing the number of bends and increasing the diameter of the pipes. This helps to improve engine performance. The header also affects the sound of the exhaust system. Aftermarket headers tend to produce a louder and more aggressive sound compared to stock headers.

Specifications and Maintenance of Subaru WRX Exhaust

There are several specifications to note in any Subaru WRX exhaust system, which include the following:

• Subaru WRX exhaust pipe diameter

  The exhaust pipes carry exhaust gases from the muffler and the rest of the exhaust system. The diameter is different depending on the model year. For instance, the 2021 model comes with a standard exhaust pipe diameter of 2.4 inches (60.4 mm) for the Subaru WRX. On the other hand, the Subaru WRX STI features larger pipes with a diameter of 3.0 inches (76.2 mm). The larger exhaust pipes in the STI model improve performance by reducing back pressure and allowing exhaust gases to flow more freely.

• Subaru WRX exhaust headers

  They are also known as exhaust manifolds, and their work is to collect exhaust gases from the engine's cylinder heads and direct them into the exhaust pipes. They come in different designs depending on the model. For example, the 2015 Subaru WRX exhaust headers feature a cast iron design, while the STI model has a more performance-oriented equal-length design.

• Subaru WRX exhaust sound

  The sound varies depending on the model year. For example, the 2020 Subaru WRX exhaust sounds aggressive and sporty, with a deep rumble that's characteristic of turbocharged four-cylinder engines. On the contrary, the sound from the 2010 WRX model is quieter and more subdued due to the less aggressive tuning of the exhaust system.

Subaru WRX exhaust maintenance ensures that the exhaust system functions optimally, which in turn helps with emissions control, fuel efficiency, and engine performance. Here are some maintenance tips:

• Inspecting the exhaust system for damage: It is recommended to check for any Subaru WRX exhaust leaks, such as holes, cracks, and rust. Spotting these damages early makes it easy to repair them before they worsen.
• Cleaning the exhaust system: Cleaning prevents the accumulation of dirt, debris, and other materials that can affect the exhaust system's performance.
• Checking for proper exhaust alignment: Proper alignment is essential for optimum performance. Therefore, make sure that the exhaust pipes, muffler, and other components are well aligned to avoid unnecessary strain on the system.
• Checking the hangers and mounts: The role of these components is to keep the exhaust system in place, but they can wear out over time. Therefore, it is essential to check for signs of wear and replace them when necessary.
• Ensure the exhaust system is sealed: A well-sealed exhaust system helps to maintain back pressure and avoid leaks. This is important for emissions control and engine performance.
• Monitoring exhaust sound: Changes in sound can indicate issues with the exhaust system. For example, a louder sound may indicate a leak or damage to the muffler, while a change in pitch may suggest a problem with the exhaust pipes or resonator.

How to Choose Subaru WRX Exhaust

• Subaru WRX exhaust system

  Consider the purpose of the exhaust system. Is it for daily driving, track use, or a combination? A balanced system may be ideal for those who do both. Think about the sound level expected. Do they want something subtle, loud, or adjustable? Determine the material preference. Stainless steel is durable, while titanium is lightweight and heat-resistant.

• Subaru WRX muffler

  Decide if a muffler is wanted or if a straight pipe is preferred for maximum sound and performance. If a muffler is chosen, consider one that provides the desired sound profile.

• Subaru WRX downpipe

  Think about whether catalytic converter removal is acceptable in areas where emissions are strictly regulated. Consider the size of the downpipe. A larger one will provide more airflow but may require other engine components to be modified.

• Subaru WRX header

  Consider the increased complexity and cost of installing headers compared to other exhaust components. Think about the potential for increased engine noise with headers.

• Subaru WRX exhaust tips

  Choose a tip style and finish that matches the vehicle's look. Decide on the exhaust tip size. Larger tips can change the sound but may not suit everyone's taste.

• Subaru wrx exhaust upgrade

  Research the potential power gains from each exhaust component. Some upgrades provide more performance than others. Check if the chosen components will fit together as a compatible exhaust system.

• Subaru wrx exhaust sound

  Listen to sound clips online to get an idea of the sound level and tone. Plan for a break-in period where the sound may change slightly over time.

• Subaru wrx exhaust heat shield

  Consider the need for a heat shield in areas where high heat resistance is required. Decide if a heat shield is wanted.

• Subaru wrx exhaust warranty

  Check if a warranty is offered by the manufacturer. This provides peace of mind in case of defects or issues with the exhaust components.

How to DIY and Replace Subaru WRX Exhaust

WRX exhaust upgrades can be a DIY endeavor with the right tools and mechanical expertise. The Subaru WRX exhaust system replacement begins with gathering the necessary tools for the job. It may include jack stands, floor jack, safety glasses, gloves, ratchet and socket set, torque wrench, penetrating oil, and an exhaust cutter or saw. Inspect the new exhaust components before starting the installation process to ensure they are free from damage and match the existing system.

Start by making the vehicle secure. Then, lift it off the ground using the floor jack and secure it with jack stands. Wear safety glasses and gloves when working under the car. It's a good idea to spray penetrating oil on the exhaust system's bolted joints and connection points. This will help loosen rusted or seized bolts to make disassembly easier. Follow the manufacturer's manual to locate the exhaust system components that need replacement.

Remove the old exhaust system carefully, starting from the front pipes and working toward the muffler. Use a ratchet and socket set to remove bolts and nuts. An exhaust cutter or saw may be necessary to cut through the pipes. Once the old exhaust components are removed, clean the exhaust mounting points on the vehicle to ensure a clean surface for the new system. Then, install the new exhaust components one at a time, starting with the downpipe and finishing with the muffler. Ensure they fit properly and are aligned with the mounting points.

After installing the new exhaust system, start the vehicle to check for any leaks or unusual noises. Tighten all connections and fittings to ensure the system functions properly and is quiet. Lower the car and remove the jack stands once the new exhaust is installed and the system is leak-free.

Q&A

Q1: Does the type of metal used for Subaru WRX exhaust pipes make a difference?

A1: Yes, it does. The metal used in exhaust pipes affects durability and performance. Stainless steel is the most common material for exhaust systems. It doesn't rust easily and can withstand high temperatures. Titanium is used in some high-performance exhausts. It's lighter than steel and handles heat well, but it's much more expensive. Compared to steel, titanium pipes reduce the car's overall weight. This boosts speed and improves handling.

Q2: Are larger exhaust pipes better for performance?

A2: When the pipe diameter is larger, more exhaust flows out of the engine. This boosts horsepower. However, very large pipes can hurt performance by creating too much back pressure. A balanced pipe size is key to getting the best torque and power from the car.

Q3: What are the different types of Subaru WRX mufflers?

A3: Mufflers are key components of the WRX exhaust system. They control noise and exhaust flow. The main types include:\n1. Absorption mufflers: These have tubes inside that let sound waves pass into fiberglass. The material absorbs the noise.\n2. Reflection mufflers: They use chambers to reflect sound waves against each other. The waves cancel out, reducing noise.\n3. Combination mufflers: Both absorption and reflection are combined to balance sound reduction and exhaust flow.\n4. Turbo mufflers: Similar to absorption but with baffles. Baffles partially break sound waves, causing turbulence that lowers noise even more.