Ever feel like your trusty ’99 Civic could use a little more bark, or maybe you’re just tired of that annoying rattle underneath? You’re not alone. The Honda Civic EK/EM chassis, especially the beloved ’99 model, is a legend for its reliability and tunability. But even legends need a little attention, and the exhaust system is often the first place owners look for an upgrade or a necessary repair.
At FatBoysOffroad, we understand the bond you have with your ride. Whether you’re a weekend warrior, a daily driver, or a budding DIY mechanic, we’re here to guide you through everything you need to know about your honda civic 99 exhaust system. From understanding its components to tackling common problems, choosing the perfect upgrade, and even installing it yourself, we’ve got you covered.
In this comprehensive guide, we’ll dive deep into the world of Civic exhausts. We’ll explore the benefits of upgrading, walk you through a DIY installation, troubleshoot common issues, and even discuss eco-friendly options. Get ready to give your ’99 Civic the voice it deserves and ensure it runs as smoothly as ever!
Understanding Your Honda Civic 99 Exhaust System
Before you can fix or upgrade, it’s crucial to understand the basic anatomy of your ’99 Civic’s exhaust system. It’s more than just a pipe; it’s a carefully engineered system designed to manage engine gases, reduce noise, and comply with emissions standards.
Key Components of the Exhaust System
Your honda civic 99 exhaust typically consists of several main parts working in harmony:
- Exhaust Manifold: This bolts directly to the engine’s cylinder head, collecting exhaust gases from each cylinder.
- Oxygen Sensors (O2 Sensors): Located before and after the catalytic converter, these sensors monitor exhaust gas composition to help the engine’s computer (ECU) adjust fuel mixture.
- Catalytic Converter: A crucial emissions control device that converts harmful pollutants into less toxic substances.
- Resonator: A chamber designed to cancel out specific sound frequencies, reducing drone and harshness. Not all systems have one.
- Muffler: The primary noise reduction component, using a series of chambers and baffles to quiet exhaust gases.
- Exhaust Pipes: Connect all these components, guiding the gases from the engine to the rear of the vehicle.
- Exhaust Hangers and Gaskets: Rubber hangers support the system and allow for movement, while gaskets seal connections to prevent leaks.
Stock vs. Aftermarket Exhausts for Your ’99 Civic
The factory honda civic 99 exhaust system is designed for quiet operation, fuel efficiency, and longevity. It’s typically made from mild steel, which can be prone to rust over time.
Aftermarket systems, on the other hand, offer a range of benefits:
- Performance: Larger diameter piping and less restrictive mufflers can improve exhaust gas flow, potentially leading to small horsepower and torque gains.
- Sound: Aftermarket exhausts come in various sound profiles, from subtle enhancements to aggressive roars.
- Durability: Many are made from stainless steel, offering superior corrosion resistance.
- Weight Reduction: Some designs are lighter than stock, contributing to overall vehicle performance.
Benefits of Upgrading Your Honda Civic 99 Exhaust
Thinking about a new exhaust for your ’99 Civic? There are several compelling reasons why an upgrade might be just what your car (and you) need. The benefits of honda civic 99 exhaust upgrades extend beyond just sound.
Enhanced Performance and Efficiency
A well-designed aftermarket exhaust system can significantly improve exhaust gas flow. This reduction in “back pressure” allows the engine to breathe more easily, which can translate into:
- Modest Horsepower Gains: While not a massive boost, a free-flowing exhaust can unlock a few extra ponies, especially when combined with other intake or tuning modifications.
- Improved Throttle Response: Quicker exhaust scavenging can lead to a more responsive engine feel.
- Potential for Better Fuel Economy: In some cases, a more efficient engine can lead to slight improvements in fuel consumption, though this is often offset by a heavier right foot enjoying the new sound!
Aesthetic Appeal and Sound Profile
Let’s be honest, a big part of the appeal is how it looks and sounds. Upgraded exhaust systems often feature:
- Stylish Exhaust Tips: Many aftermarket systems come with polished, larger diameter, or uniquely shaped honda civic 99 exhaust tips that enhance the car’s rear appearance.
- Distinctive Engine Note: From a deep, throaty rumble to a high-pitched, Honda-signature wail, you can tailor the sound to your preference.
- Reduced Weight: Some performance systems use lighter materials and simpler designs, shaving off a few pounds from your vehicle.
Choosing the Right Honda Civic 99 Exhaust
Navigating the world of aftermarket exhausts can be daunting. This honda civic 99 exhaust guide will help you make an informed decision based on your needs, budget, and desired outcome.
Types of Aftermarket Exhaust Systems
You’ll encounter several common configurations:
- Axle-Back Exhaust: Replaces only the muffler and exhaust tip. This is the most affordable option, primarily changing sound and aesthetics.
- Cat-Back Exhaust: Replaces everything from the catalytic converter back to the exhaust tip. This offers better performance gains and a more significant sound change, as it includes new piping, a resonator (optional), and a muffler.
- Header-Back Exhaust: Replaces the entire system from the exhaust manifold back. This offers the most significant performance potential but is also the most expensive and complex, often requiring a new catalytic converter or removal (which might be illegal for street use).
- Full Exhaust System (including Headers): Replaces the exhaust manifold (headers) and the entire exhaust system. This is for serious performance enthusiasts and often requires engine tuning.
Material Matters: Stainless Steel vs. Aluminized Steel
The material of your exhaust greatly impacts its durability and cost:
- Aluminized Steel: More affordable, offers better corrosion resistance than mild steel, but will eventually rust, especially in harsh climates.
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Stainless Steel (T304 or T409): The preferred choice for aftermarket systems.
- T409 Stainless Steel: Good corrosion resistance, slightly magnetic, often used for OEM-quality aftermarket systems.
- T304 Stainless Steel: Excellent corrosion resistance, non-magnetic, highly polished finish. It’s more expensive but offers superior longevity and appearance.
Sound Profiles and Legal Considerations
Exhaust sound is subjective. Listen to sound clips online, but remember they don’t always capture the in-person experience perfectly.
- Mellow: Slightly louder than stock, with a deeper tone. Good for daily drivers.
- Aggressive: Noticeably louder, often with a more pronounced rumble or rasp. Can be exhilarating but might drone on long trips.
- Race/Track: Very loud, often with minimal muffling. Usually not street legal.
Always check your local noise ordinances and emissions laws before installing an aftermarket exhaust. Modifying or removing the catalytic converter is illegal in most places for street-driven vehicles.
DIY Installation Guide: How to Replace Your Honda Civic 99 Exhaust
Ready to get your hands dirty? Replacing your honda civic 99 exhaust can be a rewarding DIY project. Follow these steps carefully, and remember, safety first!
Tools and Materials You’ll Need
- Jack and Jack Stands (NEVER work under a car supported only by a jack!)
- Wheel Chocks
- Socket Wrench Set (metric, typically 12mm, 14mm, 17mm)
- Extension and Breaker Bar (for stubborn bolts)
- Penetrating Oil (e.g., WD-40, PB Blaster)
- Exhaust Hanger Removal Tool (optional, but highly recommended)
- New Exhaust System (with all hardware, gaskets, and honda civic 99 exhaust tips)
- Wire Brush or Scraper (for cleaning flange surfaces)
- Gloves and Safety Glasses
- Torque Wrench (for final tightening)
Step-by-Step Installation Process
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Prepare Your Workspace & Safety First:
- Park your Civic on a flat, level surface.
- Engage the parking brake and place wheel chocks behind the rear wheels.
- Jack up the front and rear of the car and secure it firmly on jack stands. Ensure the car is stable before proceeding.
- Wear your safety glasses and gloves.
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Apply Penetrating Oil:
- Locate all exhaust bolts and nuts, especially those connecting to the catalytic converter and any mid-pipe flanges.
- Generously spray them with penetrating oil and let them soak for at least 15-30 minutes. This will make removal much easier.
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Remove the Old Exhaust System:
- Starting from the rear, begin unbolting the exhaust sections. You might need to support sections as you unbolt them to prevent them from falling.
- Use the exhaust hanger removal tool or a pry bar to carefully slide the rubber hangers off the metal rods.
- Work your way forward, unbolting each section and removing it. The catalytic converter bolts can be particularly stubborn.
- Be careful not to damage oxygen sensors if you plan to reuse them. Disconnect their wiring harnesses before removing the catalytic converter if necessary.
- Once all sections are unbolted and hangers are free, carefully maneuver the old exhaust out from under the car.
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Prepare for New Exhaust Installation:
- Clean any mating flange surfaces on the catalytic converter or header with a wire brush or scraper. Ensure they are free of old gasket material.
- Install new gaskets where required by your new exhaust system.
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Install the New Exhaust System:
- Start from the front (usually the catalytic converter connection) and work your way backward.
- Hang the exhaust sections loosely in the rubber hangers first. This allows for flexibility and alignment.
- Bolt up the front section first, ensuring the gasket is properly seated. Hand-tighten the bolts.
- Continue installing subsequent sections, connecting them and hanging them in place.
- Once all sections are in place and loosely bolted, adjust the exhaust for optimal clearance (avoiding rubbing against the chassis) and tip alignment.
- Once satisfied with the fit, progressively tighten all bolts, working from front to back. Refer to your car’s service manual or the exhaust manufacturer’s instructions for specific torque specs, especially for catalytic converter bolts.
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Final Checks:
- Double-check all bolts to ensure they are tightened to spec.
- Inspect all hangers to ensure they are securely holding the exhaust.
- Lower the car carefully.
- Start the engine and listen for any exhaust leaks (a hissing sound). If you hear one, locate it and tighten the corresponding connection.
- Take a short test drive, listening for any rattles or abnormal noises.
Common Problems with Honda Civic 99 Exhaust Systems & Troubleshooting
Even with proper care, exhaust systems can develop issues over time. Knowing the common problems with honda civic 99 exhaust can help you diagnose and fix them quickly.
Rust and Corrosion
This is arguably the most common enemy of any exhaust system, especially in regions with road salt or high humidity. Rust can lead to:
- Pinhole Leaks: Small holes that cause a hissing sound and allow exhaust gases to escape.
- Cracked Pipes: Larger cracks can lead to loud exhaust noise and significant leaks.
- Broken Hangers: Rust can weaken hanger welds, causing sections of the exhaust to sag or drag.
Troubleshooting: Visually inspect the entire system for rust spots, especially at welds and bends. Listen for hissing. A professional can perform a smoke test to pinpoint small leaks.
Exhaust Leaks
Leaks can occur at any connection point, flange, or due to cracks/holes in the pipes. Symptoms include:
- Loud Exhaust Noise: A sudden increase in volume or a raspy sound.
- Ticking or Hissing Sound: Especially noticeable when the engine is cold or under load.
- Smell of Exhaust Fumes: A strong smell inside the cabin is dangerous and indicates a serious leak.
- Reduced Fuel Economy or Performance: Leaks before the O2 sensors can confuse the ECU.
Troubleshooting: Perform a visual inspection. With the engine cold, you can sometimes feel escaping air with your hand (be cautious when the engine is hot!). A soapy water test (spray soapy water on connections; bubbles indicate a leak) can also help.
Rattles and Vibrations
These annoying noises often point to loose components:
- Loose Hangers: Rubber hangers can wear out or break, causing the exhaust to bang against the chassis.
- Loose Heat Shields: Metal heat shields designed to protect underbody components can come loose and rattle.
- Internal Muffler Baffle Collapse: The internal components of a muffler can break down, causing a rattling sound from inside the muffler itself.
Troubleshooting: Inspect all hangers for damage or looseness. Check heat shields for bent tabs or loose bolts. If the rattle comes from the muffler, it likely needs replacement.
Catalytic Converter Issues
The catalytic converter is a critical but expensive component. Issues can arise from:
- Clogging: Often due to engine problems (e.g., burning oil, rich fuel mixture), which can cause a loss of power, reduced acceleration, and a rotten egg smell.
- Failure: Overheating or physical damage can cause the internal honeycomb structure to melt or break apart, leading to rattling and reduced flow.
Troubleshooting: A “Check Engine Light” with codes related to catalytic converter efficiency (P0420, P0430) is a strong indicator. A backpressure test can confirm a clog. Always address the underlying engine issue first if the cat is clogged.
Honda Civic 99 Exhaust Care Guide & Best Practices
Proper maintenance can significantly extend the life of your exhaust system, whether it’s stock or aftermarket. This honda civic 99 exhaust care guide will help you keep your system in top shape.
Regular Inspections and Cleaning
- Visual Check: Periodically inspect your entire exhaust system for signs of rust, cracks, dents, or loose components. Do this during oil changes or tire rotations.
- Listen for Changes: Pay attention to any new or unusual sounds coming from your exhaust. A sudden change in noise level or tone can indicate a problem.
- Clean Exhaust Tips: For stainless steel honda civic 99 exhaust tips, use a mild metal polish and a microfiber cloth to keep them shiny and free of carbon buildup.
Protecting Against Corrosion
Corrosion is the number one enemy of exhaust systems. Here’s how to fight back:
- Regular Washing: Especially in winter, wash the underside of your car to remove road salt and grime.
- Undercoating/Rust Inhibitors: Consider having a professional apply an undercoating or rust inhibitor to your exhaust pipes and hangers, particularly if you live in a corrosive environment.
- Drain Holes: Ensure drain holes in mufflers and resonators are clear to prevent water buildup.
Addressing Issues Promptly
Don’t ignore small problems. A minor leak can quickly become a major repair:
- Fix Leaks Immediately: Even small leaks can affect engine performance and are unsafe if exhaust fumes enter the cabin.
- Replace Worn Hangers: Sagging exhaust sections put stress on other components and can lead to breakage.
- Tighten Loose Connections: Check bolts and clamps regularly and tighten as needed.
Following these honda civic 99 exhaust best practices will ensure your system lasts longer and performs better.
Eco-Friendly and Sustainable Options for Your Honda Civic 99 Exhaust
As responsible enthusiasts, it’s important to consider the environmental impact of our choices. When dealing with your honda civic 99 exhaust, there are ways to be more eco-conscious.
High-Efficiency Catalytic Converters
The catalytic converter is your car’s primary emissions control device. If yours needs replacing:
- Choose Quality Replacements: Opt for high-quality, OEM-spec or direct-fit aftermarket catalytic converters that meet or exceed emissions standards.
- Avoid “Test Pipes”: Never remove your catalytic converter or replace it with a “test pipe” for street use. This is illegal and significantly increases harmful emissions.
Sustainable Materials and Manufacturing
When purchasing a new exhaust system:
- Stainless Steel Longevity: While stainless steel production has an environmental footprint, its superior longevity means you won’t need to replace your exhaust as often, reducing waste over time.
- Recycled Content: Inquire if manufacturers use recycled materials in their exhaust components, though this is less common for high-performance parts.
Proper Disposal of Old Components
Don’t just toss your old exhaust parts in the trash:
- Scrap Metal Recycling: Most exhaust components (pipes, mufflers, resonators) are made of metal and can be recycled at local scrap metal facilities.
- Catalytic Converter Recycling: Catalytic converters contain precious metals (platinum, palladium, rhodium) and are highly sought after by recyclers. Ensure your old cat goes to a legitimate recycling facility. This is a key aspect of a sustainable honda civic 99 exhaust approach.
By making informed choices, you can ensure your eco-friendly honda civic 99 exhaust practices contribute to a cleaner environment.
Honda Civic 99 Exhaust Tips: The Finishing Touch
While the internal components do the heavy lifting, the visible honda civic 99 exhaust tips are what often catch the eye. They’re not just for looks; they can subtly influence sound too.
Style and Material Options
Exhaust tips come in a vast array of styles:
- Polished Stainless Steel: The most popular choice, offering a shiny, clean look that resists corrosion.
- Burnt Titanium: Offers a unique, iridescent blue/purple finish, often found on high-end performance exhausts.
- Carbon Fiber Wrapped: A lightweight and sporty aesthetic, typically over a metal core.
- Rolled vs. Straight Cut: Rolled edges offer a more finished, subtle look, while straight cuts are sharper and more aggressive.
- Single, Dual, or Oval: Depending on your bumper cut-out and desired look, you can choose from various configurations.
Installation and Maintenance of Exhaust Tips
- Clamp-On Tips: The easiest to install, they simply clamp onto your existing exhaust pipe. Ensure a snug fit to prevent rattling.
- Weld-On Tips: Offer a more secure and seamless look, but require welding. This is often the case with integrated tips on aftermarket mufflers.
- Cleaning: Regularly clean your exhaust tips with appropriate metal polish or soap and water to prevent carbon buildup and maintain their shine. Stubborn carbon can often be removed with a fine steel wool (use carefully and test on an inconspicuous area first) or specialized exhaust tip cleaners.
Choosing the right tips allows you to personalize your Civic’s rear end, completing the look of your upgraded exhaust system.
Frequently Asked Questions About Honda Civic 99 Exhaust
What is the best exhaust for a daily driven Honda Civic 99?
For a daily driver, a cat-back exhaust made from T304 stainless steel is often the best balance. It offers noticeable sound improvement, modest performance gains, and excellent durability without being excessively loud or droning. Brands like MagnaFlow, Tanabe, or Skunk2 offer good options, but always check reviews for sound levels.
Will upgrading my Honda Civic 99 exhaust void my warranty?
Since the 1999 Civic is an older vehicle, factory warranties are long expired. However, if you have an extended aftermarket warranty, check its terms. Generally, modifying the exhaust would not void a warranty on unrelated parts (e.g., engine internals) unless the exhaust directly caused damage to those parts.
How much does it cost to replace a Honda Civic 99 exhaust?
The cost varies widely. An axle-back system might range from $150-$400. A full cat-back system can be $300-$1000+, depending on material and brand. Professional installation typically adds $100-$300. DIY can save you significant labor costs.
Can I just replace the muffler on my ’99 Civic?
Yes, you can. Replacing just the muffler is called an “axle-back” exhaust modification. It’s the most straightforward and cheapest way to change the sound and look of your honda civic 99 exhaust, often including new honda civic 99 exhaust tips. Performance gains will be minimal, if any.
How do I know if my catalytic converter is bad?
Common signs of a failing catalytic converter include a “Check Engine Light” (often with codes like P0420), a rotten egg smell, reduced engine power and acceleration, and sometimes a rattling sound from underneath the car (indicating internal damage). A qualified mechanic can perform diagnostic tests to confirm its condition.
Conclusion: Give Your Civic Its Voice
Your Honda Civic ’99 is more than just a car; it’s a statement. And its exhaust system plays a huge role in that statement, from its sound and performance to its overall reliability.
By understanding the components, knowing how to spot and fix common issues, and choosing the right upgrades, you’re not just maintaining a vehicle—you’re enhancing an icon. Remember to prioritize safety in all your DIY endeavors, use the right tools, and don’t hesitate to consult a professional if a task feels beyond your skill level.
Whether you’re chasing a few extra horsepower, a deeper rumble, or simply ensuring your exhaust system is leak-free and functioning perfectly, this guide has equipped you with the knowledge to tackle your honda civic 99 exhaust project with confidence. Get out there, get wrenching, and enjoy the open road!
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