Hey guys! Let's dive into the world of the 1990 Honda Civic Sedan exhaust systems. If you're looking to boost your ride's performance, sound, or even just replace a rusty old pipe, you're in the right place. We'll cover everything from stock systems to aftermarket upgrades, so buckle up!

Understanding the Stock Exhaust System

Let's start with the basics: the stock exhaust system on your 1990 Honda Civic Sedan. This system is designed by Honda to be quiet, efficient, and meet emissions standards. It's a carefully engineered setup that includes several key components. First, you have the exhaust manifold, which collects exhaust gases from the engine cylinders. From there, the gases flow into the catalytic converter, which reduces harmful pollutants. Next, the gases travel through the resonator, which helps to dampen sound, and finally, they exit through the muffler, which further reduces noise. The tailpipe is the final piece, directing the exhaust away from the vehicle.

The design of the stock system prioritizes low cost and reliability. The pipes are usually made from mild steel, which is durable but prone to rust over time, especially in areas with harsh weather conditions. The diameter of the pipes is relatively narrow, which helps to maintain backpressure, crucial for low-end torque and fuel efficiency in a stock engine. However, this narrow diameter can also restrict exhaust flow, limiting the engine's potential power output at higher RPMs. For most daily driving situations, the stock exhaust is perfectly adequate, providing a balance of performance, noise, and emissions control. However, if you're looking to enhance your Civic's performance or give it a more aggressive sound, an aftermarket exhaust system might be the way to go. Many enthusiasts find that upgrading the exhaust is one of the first modifications they make to their vehicles, as it can provide noticeable improvements in both performance and driving experience. Before making any changes, it's always a good idea to understand the specific components of your stock system and how they work together to ensure you make informed decisions about any potential upgrades.

Why Upgrade Your Exhaust?

So, why should you even bother upgrading your 1990 Honda Civic exhaust? Well, there are several compelling reasons. Firstly, an aftermarket exhaust system can significantly improve your car's performance. By using larger diameter pipes and less restrictive mufflers, these systems reduce backpressure, allowing your engine to breathe more freely. This can result in noticeable gains in horsepower and torque, especially at higher RPMs. Secondly, an upgraded exhaust can dramatically change the sound of your Civic. Whether you're after 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.

Beyond performance and sound, there are other benefits to consider. Many aftermarket exhaust systems are made from higher-quality materials like stainless steel or even titanium. These materials are much more resistant to rust and corrosion than the mild steel used in most stock systems, meaning they'll last much longer and maintain their appearance over time. An upgraded exhaust can also enhance the overall look of your car, with polished tips and sleek designs that add a touch of style. Furthermore, some aftermarket systems are designed to be lighter than the stock exhaust, which can improve your car's handling and acceleration. Of course, it's essential to choose an exhaust system that's compatible with your car's specific model and year. Different engines and chassis configurations may require different exhaust setups, so doing your research is crucial. Additionally, consider the potential impact on emissions. While many aftermarket exhausts are designed to be emissions-legal, some may not meet local regulations, so it's important to check before making a purchase. Ultimately, upgrading your exhaust is a matter of personal preference and what you want to achieve with your car. Whether you're seeking more power, a better sound, improved durability, or simply a more stylish look, an aftermarket exhaust system can be a worthwhile investment.

Types of Aftermarket Exhaust Systems

Okay, let's talk about the different types of aftermarket exhaust systems you can get for your 1990 Civic. You've got a few main categories to consider:

• Cat-Back Systems: These replace everything from the catalytic converter back to the tailpipe. They're a popular choice because they're relatively easy to install and offer a good balance of performance and sound improvement.
• Axle-Back Systems: These are even simpler, replacing just the muffler and tailpipe. They're a great option if you're primarily looking for a sound upgrade and don't want to spend a lot of money.
• Headers: Headers replace the exhaust manifold and are designed to improve exhaust flow from the engine. They can provide significant performance gains but are more complex to install and may require additional modifications.
• Full Exhaust Systems: These replace the entire exhaust system from the engine to the tailpipe, offering the most comprehensive performance upgrade. However, they're also the most expensive and complex to install.

Each type of system has its own advantages and disadvantages, so it's important to consider your goals and budget when making a decision. Cat-back systems are a great middle-ground, offering a noticeable improvement in both performance and sound without requiring extensive modifications. Axle-back systems are the most budget-friendly option, perfect for those who want a quick and easy sound upgrade. Headers and full exhaust systems are for serious enthusiasts who are looking to maximize their car's performance potential. When choosing an exhaust system, also consider the materials it's made from. Stainless steel is a popular choice due to its durability and resistance to corrosion, while titanium is even lighter and stronger but also more expensive. The diameter of the exhaust pipes is another important factor. Larger diameter pipes can improve exhaust flow, but going too large can actually reduce performance by decreasing backpressure. Researching different brands and reading reviews can help you find a system that's well-suited to your needs and preferences. Ultimately, the best exhaust system for your 1990 Civic will depend on your individual goals and how you plan to use your car.

Choosing the Right Exhaust for Your Civic

Choosing the right exhaust for your 1990 Civic can feel like navigating a maze, but don't sweat it. First, think about what you want to achieve. Are you aiming for more power, a louder exhaust note, or just a fresh look? Once you've defined your goals, you can start narrowing down your options.

Consider your budget, as exhaust systems can range from a couple of hundred dollars to over a thousand. Research different brands and read reviews to get an idea of the quality and performance you can expect. Pay attention to the materials used, with stainless steel being a popular choice for its durability. Think about the type of exhaust system that best suits your needs, whether it's a cat-back, axle-back, or a full system. Also, factor in the ease of installation. Some systems are designed to be direct bolt-ons, while others may require more extensive modifications.

Don't forget to check local emissions regulations to ensure that the exhaust system you choose is street legal in your area. An exhaust system that's too loud or doesn't meet emissions standards can lead to fines and other headaches. Consider how the new exhaust will affect your car's overall performance. While a larger diameter exhaust can improve airflow, it can also reduce backpressure, which can negatively impact low-end torque. Talk to other Civic owners or consult with a mechanic to get recommendations based on their experience. Remember, the right exhaust system is one that meets your goals, fits your budget, and complies with local regulations.

Installation Tips

Alright, you've got your new exhaust system. Now, let's talk installation. If you're a seasoned DIYer, you might be comfortable tackling this yourself. However, if you're not mechanically inclined, it's best to leave it to a professional. If you're going the DIY route, here are a few tips to keep in mind:

• Safety First: Always wear safety glasses and gloves when working under your car. Use jack stands to support the vehicle securely.
• Preparation: Before you start, gather all the necessary tools and read the instructions carefully. Make sure you have everything you need before you begin.
• Penetrating Oil: Apply penetrating oil to any rusty bolts or connections to make them easier to remove. Let it soak for a while before attempting to loosen them.
• Patience: Take your time and don't force anything. If a bolt is stuck, try heating it with a torch or using a breaker bar for more leverage.
• Proper Alignment: When installing the new exhaust, make sure everything is properly aligned before tightening the bolts. This will prevent leaks and ensure that the system fits correctly.

If you're installing a full exhaust system or headers, you may need to remove other components, such as the oxygen sensors or heat shields. Be careful not to damage these parts during the process. When tightening the bolts, use a torque wrench to ensure they're tightened to the correct specification. Over-tightening can damage the bolts or the exhaust system. After the installation is complete, start the engine and check for any leaks. If you hear any hissing or see exhaust fumes escaping, tighten the connections until the leak is gone. Finally, take your Civic for a test drive and enjoy the new sound and performance of your upgraded exhaust system. If you encounter any problems or are unsure about any part of the installation, don't hesitate to seek professional help. A properly installed exhaust system will not only improve your car's performance and sound but also ensure its longevity and safety.

Maintaining Your New Exhaust

So, you've got that shiny new exhaust system installed on your 1990 Civic. Great! Now, let's talk about keeping it in tip-top shape. Regular maintenance will not only extend the life of your exhaust but also ensure it continues to perform at its best.

First, visually inspect your exhaust system regularly for any signs of damage, such as rust, cracks, or leaks. Pay particular attention to the connections between the different components, as these are common areas for leaks to develop. If you live in an area with harsh weather conditions or where salt is used on the roads, consider washing your exhaust system regularly to remove any corrosive materials. Use a mild soap and water solution and rinse thoroughly. For stainless steel exhausts, you can use a stainless steel cleaner to remove any surface rust or discoloration. Avoid using abrasive cleaners or scouring pads, as these can scratch the surface of the exhaust. Check the exhaust hangers regularly to ensure they're in good condition and properly supporting the exhaust system. Replace any worn or damaged hangers to prevent the exhaust from sagging or rubbing against other parts of the car. Listen for any unusual noises, such as rattling or hissing, which could indicate a problem with the exhaust system. If you hear any unusual noises, have the exhaust system inspected by a mechanic. Finally, consider having your exhaust system professionally inspected at least once a year. A mechanic can identify any potential problems and perform any necessary maintenance to keep your exhaust system in good working order. By following these simple maintenance tips, you can ensure that your new exhaust system lasts for many years and continues to provide you with the performance and sound you're looking for.

Alright, that's a wrap on upgrading the exhaust on your 1990 Honda Civic Sedan. Whether you're after a performance boost, a better sound, or just a fresh look, I hope this guide has been helpful. Happy wrenching!