Hey guys! Let's dive into the world of upgrading the exhaust system on a 1990 Honda Civic Sedan. Whether you're aiming for better performance, a sportier sound, or simply replacing a worn-out system, this guide will walk you through everything you need to know.

Why Upgrade Your 1990 Honda Civic Sedan Exhaust?

Upgrading your 1990 Honda Civic Sedan's exhaust system can bring a host of benefits that go beyond just aesthetics. The exhaust system is a critical component of your vehicle, responsible for removing combustion gases from the engine. An upgraded exhaust can significantly impact your car's performance, sound, and overall efficiency. Let's explore the key reasons why you might consider this upgrade.

Enhanced Performance

One of the primary reasons car enthusiasts upgrade their exhaust systems is to improve engine performance. The stock exhaust systems in many vehicles, including the 1990 Honda Civic Sedan, are often designed with cost-effectiveness and noise reduction in mind, which can restrict the engine's ability to breathe efficiently. An aftermarket exhaust system, especially one designed with larger diameter pipes and less restrictive mufflers, can reduce backpressure. This reduction allows the engine to expel exhaust gases more easily, resulting in improved horsepower and torque. The engine doesn't have to work as hard to push out the exhaust, which translates to a more responsive and powerful driving experience.

For the 1990 Honda Civic Sedan, this improvement can be particularly noticeable. The D-series engines in these Civics, while reliable, can benefit from any enhancements that improve airflow. By installing a high-flow exhaust system, you're essentially freeing up the engine to perform at its peak potential. This upgrade can be felt in quicker acceleration, better throttle response, and an overall more enjoyable driving experience. Keep in mind that to fully maximize these gains, you might also consider pairing your exhaust upgrade with other performance enhancements such as an upgraded intake or a tune.

Improved Sound

Another compelling reason to upgrade your Civic's exhaust is the sound. The stock exhaust systems are generally designed to be quiet, which might not appeal to everyone, especially those who enjoy a sportier, more aggressive engine note. Upgrading to an aftermarket exhaust system allows you to customize the sound of your vehicle to match your personal preferences. Whether you prefer a deep, throaty rumble or a high-pitched, race-inspired scream, there's an exhaust system out there that can deliver the sound you're looking for.

When choosing an exhaust system for sound, it's important to consider the different types of mufflers and resonators available. Chambered mufflers, for example, tend to produce a deeper, more mellow tone, while straight-through mufflers offer a louder, more aggressive sound. Resonators can help to reduce unwanted drone and rasp, ensuring that the exhaust note is clean and refined. It's also crucial to be mindful of local noise regulations, as excessively loud exhaust systems may not be street legal. Researching and listening to sound clips of different exhaust systems can help you make an informed decision and avoid any legal issues.

Aesthetical Appeal

Beyond performance and sound, a new exhaust system can significantly enhance the visual appeal of your 1990 Honda Civic Sedan. Many aftermarket exhaust systems come with polished stainless steel tips that add a touch of style to the rear of your vehicle. These tips can range in size and design, allowing you to choose one that complements the overall look of your car. A clean, shiny exhaust tip can make your Civic stand out and give it a more customized, sporty appearance.

Additionally, some exhaust systems are designed with more aggressive routing and larger diameter pipes, which can be visible from certain angles. This can give your Civic a more purposeful and performance-oriented look. However, it's important to ensure that the exhaust system is properly installed and doesn't hang too low, as this can create a safety hazard. Professional installation is often recommended to ensure that the exhaust system is securely mounted and properly aligned.

Replacement of Worn Components

Finally, upgrading your exhaust system can be a necessity if your original system is old, corroded, or damaged. Over time, exhaust systems can rust and develop leaks, which can reduce engine performance, increase emissions, and create unpleasant noises. Replacing a worn-out exhaust system with a new, upgraded system can restore your Civic's performance and ensure that it meets emissions standards. This is especially important for older vehicles like the 1990 Honda Civic Sedan, where the original exhaust system may be nearing the end of its lifespan.

Types of Exhaust Systems for the 1990 Honda Civic Sedan

When it comes to upgrading the exhaust system on your 1990 Honda Civic Sedan, you'll find that there's a variety of options available, each designed to cater to different needs and preferences. Understanding the different types of exhaust systems can help you make an informed decision and choose the one that best suits your goals. Here's an overview of the most common types of exhaust systems for the 1990 Honda Civic Sedan:

Cat-Back Systems

Cat-back systems are one of the most popular choices for upgrading the exhaust on a 1990 Honda Civic Sedan. These systems replace everything from the catalytic converter back to the exhaust tip, including the mid-pipe and muffler. Cat-back systems are designed to improve exhaust flow and reduce backpressure, which can result in noticeable gains in horsepower and torque. They also offer a sportier exhaust note compared to the stock system.

The primary advantage of cat-back systems is that they are relatively easy to install, as they typically bolt directly onto the existing catalytic converter. This makes them a great option for DIY enthusiasts who want to upgrade their exhaust without having to modify the exhaust manifold or catalytic converter. Cat-back systems are available in a variety of configurations, with different muffler options that allow you to customize the sound of your exhaust. You can choose from chambered mufflers for a deep, mellow tone, or straight-through mufflers for a louder, more aggressive sound.

Axle-Back Systems

Axle-back systems are another popular option for upgrading your exhaust. These systems replace only the components from the rear axle to the exhaust tip, typically including the muffler and exhaust tip. Axle-back systems are primarily designed to improve the sound and aesthetics of your vehicle, rather than to significantly increase performance. While they may offer a slight improvement in exhaust flow, the gains are generally less noticeable compared to cat-back systems.

The main advantage of axle-back systems is that they are even easier to install than cat-back systems. They typically bolt directly onto the existing exhaust system behind the rear axle, making them a quick and simple upgrade. Axle-back systems are a great option for those who want to enhance the sound and appearance of their exhaust without making major modifications to the rest of the system. They are also a more budget-friendly option compared to cat-back systems.

Header-Back Systems

Header-back systems, also known as turbo-back systems for turbocharged vehicles, are the most comprehensive exhaust upgrade option. These systems replace everything from the exhaust manifold (header) to the exhaust tip, including the catalytic converter, mid-pipe, and muffler. Header-back systems are designed to maximize exhaust flow and minimize backpressure, resulting in the most significant gains in horsepower and torque.

The primary advantage of header-back systems is their ability to dramatically improve engine performance. By replacing the restrictive stock exhaust manifold with a high-flow header, these systems allow the engine to breathe more freely, resulting in increased power and responsiveness. However, header-back systems are also the most complex and expensive option. They typically require professional installation, as they may involve modifications to the engine and exhaust system. Additionally, replacing the catalytic converter may not be legal in some areas, so it's important to check local regulations before installing a header-back system.

DIY Custom Exhaust

For the more adventurous and mechanically inclined, building a custom exhaust system from scratch is also an option. This involves sourcing individual components such as pipes, mufflers, resonators, and exhaust tips, and then welding them together to create a unique exhaust system tailored to your specific needs and preferences. Building a custom exhaust system allows you to have complete control over the design and performance of your exhaust.

The primary advantage of building a custom exhaust system is its flexibility. You can choose the exact components you want and design the system to optimize exhaust flow, sound, and appearance. However, building a custom exhaust system requires advanced fabrication skills and specialized equipment, such as a welder and pipe bender. It's also important to have a good understanding of exhaust system design principles to ensure that the system performs optimally and meets all applicable regulations. This option is best suited for experienced DIYers who are comfortable with metal fabrication and welding.

Choosing the Right Exhaust System

Choosing the right exhaust system for your 1990 Honda Civic Sedan depends on several factors, including your budget, your performance goals, and your personal preferences. Here’s how to make the best decision:

Consider Your Budget

Exhaust systems can range in price from a few hundred dollars to over a thousand, depending on the type of system and the materials used. Determine how much you're willing to spend before you start shopping, and stick to your budget.

Set Your Performance Goals

Are you looking for maximum horsepower gains, or are you simply trying to improve the sound and appearance of your exhaust? If you're after performance, a cat-back or header-back system is the way to go. If you're more concerned with sound and aesthetics, an axle-back system may be sufficient.

Research Different Brands and Models

Read reviews and compare different brands and models to get an idea of their quality, performance, and sound. Look for systems that are specifically designed for the 1990 Honda Civic Sedan to ensure a proper fit.

Check Local Regulations

Make sure that the exhaust system you choose is legal in your area. Some states and municipalities have strict noise regulations, and replacing the catalytic converter may not be allowed. Check with your local authorities to ensure that your exhaust system complies with all applicable laws.

Installation Tips

Whether you decide to install the exhaust system yourself or have it professionally installed, here are a few tips to keep in mind:

• Use the Right Tools: Make sure you have all the necessary tools, including a socket set, wrenches, a jack, jack stands, and penetrating oil.
• Apply Penetrating Oil: Spray all the bolts and nuts with penetrating oil a day or two before you plan to start the installation. This will make it easier to remove them.
• Follow the Instructions: Read the installation instructions carefully before you begin, and follow them step by step.
• Get Help if Needed: If you're not comfortable installing the exhaust system yourself, don't hesitate to seek professional help.

Conclusion

Upgrading the exhaust system on your 1990 Honda Civic Sedan can be a rewarding experience. Whether you're looking for improved performance, a sportier sound, or simply a fresh look, there's an exhaust system out there that's perfect for you. Just remember to do your research, set a budget, and follow the installation instructions carefully. Happy motoring!