An exhaust system is a crucial vehicle component that directs harmful emissions away from the engine and reduces noise. Upgrading to an aftermarket exhaust system is a common practice among vehicle enthusiasts to enhance performance and improve aesthetics.
Before investing in an aftermarket exhaust system, it is essential to consider several factors to make an informed decision.
What is an Aftermarket Exhaust, and Should I Get One?
The term "aftermarket exhaust" refers to a replacement exhaust system for your vehicle that differs from the one installed by the manufacturer. These systems are not just cosmetic changes but enhance performance, increase horsepower and torque, and improve the vehicle's sound and aesthetics.
Purpose and Benefits of an Aftermarket Exhaust
One of the primary reasons car enthusiasts opt for an aftermarket exhaust system is to improve their vehicle's performance. By allowing the engine to expel exhaust gases more efficiently, aftermarket exhausts can contribute to a smoother flow of air in and out of the engine, resulting in enhanced performance. This improved exhaust flow can increase horsepower and torque, providing a noticeable difference in the vehicle's overall power delivery.
Aside from the performance benefits, aftermarket exhaust systems also offer an opportunity to customise the sound and appearance of your vehicle. Aftermarket exhausts are designed to produce a more aggressive exhaust note, giving your vehicle a sportier and more distinctive sound. These systems often come with different aesthetic options, such as various exhaust tip styles and materials, allowing you to personalise the look of your vehicle's rear end.
Considerations Before Getting an Aftermarket Exhaust
Firstly, you need to verify the compatibility of the aftermarket exhaust with your specific vehicle's make and model. Not all aftermarket exhaust systems are universally compatible, so choosing one that fits your vehicle's specifications is crucial to avoid installation issues.
Additionally, budget constraints play a significant role in determining whether an aftermarket exhaust is a feasible upgrade for you. These systems can vary widely in price depending on the design's brand, material, and complexity. It is essential to establish a clear budget and research different options to find an aftermarket exhaust that offers the desired performance and features within your financial means.
It is crucial to consider noise regulations in your area and your preferences regarding the exhaust sound. While many aftermarket exhaust systems are designed to produce a louder and more aggressive exhaust note, this may not be permissible in all locations due to noise ordinances. Therefore, ensuring that the aftermarket exhaust you choose complies with local regulations and aligns with your preferences for exhaust sound level is essential.
Should You Get an Aftermarket Exhaust?
Whether to invest in an aftermarket exhaust ultimately comes down to your priorities and preferences as a vehicle owner. Suppose you want to enhance your vehicle's performance, increase horsepower and torque, and achieve a more dynamic and aggressive exhaust. In that case, an aftermarket exhaust is a viable upgrade option. Aftermarket exhaust systems' performance improvements and customisation possibilities can significantly enhance your driving experience and make your vehicle stand out.
1. The Benefits of a Stainless Steel Exhaust System
Regarding vehicle maintenance and performance upgrades, the exhaust system ensures optimal functioning. One of the key decisions for vehicle owners is choosing between a traditional mild steel exhaust system and a stainless steel one.
There are four main types of steel used in exhausts; here’s a look at the pros and cons of each.
Durability
A primary advantage of opting for a stainless steel exhaust system is its superior durability. Stainless steel is inherently more robust than mild steel, offering greater strength and resistance to damage. The durability of stainless steel makes it particularly well-suited for withstanding the harsh conditions to which exhaust systems are exposed, such as extreme temperatures and corrosive elements. As a result, vehicles equipped with a stainless steel exhaust system are likely to experience fewer issues related to rust, corrosion, and physical damage, thus contributing to overall longevity and reliability.
Corrosion Resistance
Corrosion is a common issue that plagues many vehicle components, especially those exposed to the elements and varying environmental conditions. Unlike mild steel, which is prone to rust and corrosion over time, stainless steel is highly resistant to these forms of degradation. The corrosion-resistant properties of stainless steel make it an ideal choice for an exhaust system, as it can maintain its structural integrity and appearance over an extended period. By investing in a stainless steel exhaust system, vehicle owners can mitigate the risks associated with corrosion-related damage and avoid costly repairs or replacements.
Longer Lifespan
The durability and corrosion resistance inherent in stainless steel translates into a longer lifespan for exhaust systems made from this material. Compared to mild steel exhaust systems that may deteriorate more rapidly under challenging conditions, stainless steel systems are designed to last significantly longer. A stainless steel exhaust system's extended lifespan offers vehicle owners peace of mind. Also, it is a cost-effective investment in the long run, as it reduces the frequency of replacements and maintenance requirements.
Heat Resistance
In addition to its durability and corrosion resistance, stainless steel boasts superior heat resistance properties, making it an excellent choice for exhaust systems. The high temperatures generated during the combustion process in a vehicle's engine can place immense stress on the exhaust system, potentially leading to warping, cracking, or other forms of damage. Stainless steel is better equipped to withstand these extreme temperatures without compromising its structural integrity, ensuring that the exhaust system functions optimally even under intense heat conditions. This heat resistance feature further enhances the overall performance and reliability of the exhaust system, making it a preferred option for discerning vehicle owners seeking enhanced durability.
Discolouration Resistance
Another notable benefit of stainless steel exhaust systems is their resistance to discolouration. Mild steel exhaust systems are prone to developing unsightly discolouration over time, detracting from the vehicle's aesthetic appeal and indicating potential corrosion or heat-related issues. In contrast, stainless steel maintains its sleek appearance and original finish even after prolonged use, preserving the exhaust system's visual appeal and contributing to the vehicle's overall aesthetics. This resistance to discolouration underscores the superior quality and lasting performance of stainless steel exhaust systems, making them a desirable choice for those looking to maintain the pristine look of their vehicles.
2. How Thick Should an Exhaust Pipe Be?
The thickness of an exhaust pipe plays a significant role in determining its durability and overall performance. Thicker pipes are known to be more resilient to heat, reducing the likelihood of cracks or leaks and ensuring a longer lifespan for the exhaust system.
The thickness of an exhaust pipe is closely linked to its durability and ability to withstand the harsh conditions to which it is exposed. Thicker pipes have a higher heat capacity, meaning they can handle the intense temperatures generated by the exhaust gases more effectively. As a result, they are less likely to develop cracks or leaks, which can lead to exhaust system malfunctions and decreased performance. This highlights the importance of considering the thickness of the exhaust pipe when upgrading or replacing the existing system with an aftermarket option.
When it comes to durability, the thickness of an exhaust pipe is a key factor to consider. Thicker pipes are inherently more robust and have a more excellent resistance to heat and external forces. This makes them better equipped to handle the rigours of daily driving, especially under high-stress conditions such as towing or off-roading. Additionally, thicker pipes are less prone to corrosion and damage from road debris, further enhancing their durability and longevity.
In terms of performance, an exhaust pipe's thickness can significantly impact how efficiently it functions within the overall exhaust system. Thicker pipes facilitate the smooth flow of exhaust gases, reducing back pressure and ensuring the engine can expel gases more effectively. This can improve engine performance, increase horsepower and torque, and enhance fuel efficiency. Therefore, selecting an exhaust system with the appropriate thickness is essential for maximising performance benefits.
Several factors must be considered when choosing the right thickness for an exhaust pipe. The type of vehicle, its engine specifications, and its intended use all play a role in determining the optimal thickness for the exhaust system. For high-performance vehicles or those used for towing or racing, thicker pipes may be more suitable to withstand the increased heat and pressure generated by the engine. On the other hand, everyday commuter vehicles may not require as thick an exhaust pipe as they are subjected to less extreme conditions.
3. Exhaust Mufflers and Resonators
Cameron Alford explains the difference between a muffler and a resonator.
Mufflers and resonators are essential to a vehicle's exhaust system, significantly reducing noise levels and enhancing exhaust sound. Mufflers are specifically designed to cancel out sound waves generated during the combustion process, thereby minimising the overall noise emitted by the vehicle. By employing internal chambers and sound-absorbing materials, mufflers effectively dampen the sound produced by the engine, resulting in a quieter exhaust note.
On the other hand, resonators serve a slightly different function by targeting and eliminating specific frequencies within the exhaust sound. While mufflers focus on overall noise reduction, resonators are utilised to fine-tune the exhaust tone, helping to achieve a smoother and more harmonious sound output. By strategically placing resonators within the exhaust system, unwanted frequencies can be neutralised, resulting in a more pleasant auditory experience for the driver and bystanders.
When considering installing an aftermarket exhaust system, paying attention to the type and quality of mufflers and resonators included in the setup is crucial. Different configurations of mufflers and resonators can yield varying exhaust notes, ranging from deep and aggressive to subtle and refined. Therefore, selecting the appropriate components to achieve the desired sound output is paramount for customising their vehicle's exhaust system.
In the process of choosing mufflers and resonators for an aftermarket exhaust system, several factors should be taken into account. Vehicle type, local noise regulations, and personal preferences regarding sound output are all critical considerations when determining the most suitable components for a particular application. Additionally, opting for high-quality mufflers and resonators ensures longevity and durability and contributes to overall performance improvements in the exhaust system.
Consulting with automotive professionals or fellow enthusiasts can provide valuable insight into selecting suitable mufflers and resonators for a specific vehicle and desired sound profile. Their expertise and experience can help navigate the vast array of options, ensuring that the chosen components meet functional and aesthetic requirements.
4. What is the Best Exhaust Pipe Diameter?
When optimising a vehicle's performance, every component, including the exhaust system, plays a crucial role. The diameter of the exhaust pipe is a key factor that can significantly impact exhaust flow and overall performance.
Exhaust Flow and Performance
The diameter of the exhaust pipe directly impacts the flow of exhaust gases from the engine. A larger diameter allows for better exhaust gas flow, reducing back pressure and improving engine efficiency. The smoother the exhaust gas can exit the engine, the better the vehicle's overall performance.
Power Gains
One of the primary reasons enthusiasts consider modifying the exhaust pipe diameter is to achieve potential power gains. A larger diameter exhaust pipe can enhance horsepower and torque output by allowing the engine to breathe more freely. This is especially noticeable in high-performance vehicles, where every bit of power matters.
Factors Influencing the Ideal Pipe Diameter
While a larger diameter exhaust pipe may seem the optimal choice for maximising performance, the ideal pipe diameter varies based on several factors. The size of the engine plays a significant role in determining the most suitable exhaust pipe diameter. A smaller engine mat benefits from a larger diameter pipe than a larger engine.
Intended Use of the Vehicle
Another crucial factor to consider when selecting the exhaust pipe diameter is the vehicle's intended use. A daily driver may require a different exhaust pipe diameter than a track-focused or performance car. The driving conditions, such as city driving versus highway cruising, can influence the ideal pipe diameter for optimal performance.
Consulting with Experts
Given the complexity of determining the best exhaust pipe diameter for a specific vehicle, consulting with automotive experts or researching particular recommendations for your vehicle model can be invaluable. Professional tuners or mechanics can provide insights based on their experience and knowledge to help you make an informed decision.
5. Exhaust Heat Reduction
Exhaust heat is a byproduct of the combustion process in a vehicle's engine. This heat can harm surrounding components in the engine bay, leading to performance issues and potential damage. Upgrading to an aftermarket exhaust system with proper heat insulation is a viable solution to reduce heat levels within the engine bay and improve overall vehicle performance.
The Impact of Exhaust Heat on Vehicle Components:
Excessive heat from the exhaust can negatively impact various components in the engine bay. It can cause surrounding parts to heat up, leading to premature wear and reduced lifespan. Wiring, harnesses, hoses, and sensors can be particularly vulnerable to heat damage. Moreover, high exhaust temperatures can affect the engine's performance by causing heat soak and reducing overall efficiency.
Upgrading to an Aftermarket Exhaust System:
One effective way to combat the adverse effects of exhaust heat is to upgrade to an aftermarket exhaust system. These systems are designed with heat reduction in mind and often feature better insulation materials than stock exhausts. By investing in a high-quality aftermarket exhaust system, vehicle owners can effectively lower the heat levels within the engine bay, thus safeguarding surrounding components from heat damage.
Importance of Proper Heat Insulation:
Proper heat insulation is essential in an exhaust system to reduce heat levels and protect surrounding components. Insulation materials such as ceramic coatings and thermal wraps can significantly decrease the heat radiated from the exhaust. By incorporating these insulation technologies into an aftermarket exhaust system, vehicle owners can create a more thermally efficient environment in the engine bay, improving performance and durability.
Enhancing Efficiency and Longevity with Heat-Reducing Technologies:
Aftermarket exhaust systems incorporating heat-reducing technologies offer additional benefits beyond reducing heat levels. These systems can enhance the vehicle's overall performance by minimising heat soak and improving thermal efficiency. Reduced heat in the engine bay can lead to cooler intake air temperatures, resulting in improved combustion and increased horsepower. Moreover, lower exhaust temperatures can help prevent overheating of surrounding components, thereby extending their longevity.
6. Will an Aftermarket Exhaust Improve Fuel Economy?
An aftermarket exhaust system is designed to replace the original exhaust system of a vehicle, with the primary goal of enhancing performance and improving the sound produced by the engine. While these systems are popular among car enthusiasts for the noticeable improvements in engine performance and the distinctive exhaust notes they provide, a common question arises regarding their impact on fuel economy.
By optimising the flow of exhaust gases, these systems can improve engine efficiency and power output, leading to better overall performance. Additionally, the reduced weight of aftermarket exhaust components can contribute to a slight increase in fuel efficiency by reducing the overall load on the vehicle.
While these factors can contribute to marginal improvements in fuel economy, consumers need to set realistic expectations when considering the impact of aftermarket exhaust systems on their gas mileage systems, which primarily focus on performance and sound enhancement rather than fuel efficiency. Therefore, any gains in fuel economy should be viewed as secondary benefits rather than primary objectives when investing in an aftermarket exhaust system.
Several factors can influence the actual impact of an aftermarket exhaust system on fuel economy, including the design of the system, driving habits, and overall vehicle maintenance. A well-designed aftermarket exhaust system that promotes better exhaust flow without compromising emissions compliance can lead to minor fuel efficiency gains. However, aggressive driving techniques or neglecting proper vehicle maintenance can offset these potential gains, highlighting the importance of holistic vehicle care to maximise fuel efficiency.
It is essential to recognise that an aftermarket exhaust system's primary purpose is to enhance a vehicle's performance and sound, with fuel economy improvements being a secondary consideration. While some drivers may experience slight gains in fuel efficiency with these systems, the overall impact is likely limited compared to the noticeable performance and sound quality enhancements. As such, consumers should prioritise their goals and preferences when deciding to invest in an aftermarket exhaust system.
7. Why Exhaust Systems Must Come with a Catalytic Converter or a DPF
Catalytic converters and diesel particulate filters (DPF) have become crucial components in modern exhaust systems to reduce harmful emissions released into the atmosphere. This component significantly minimises the environmental impact of vehicle emissions by converting pollutants into less harmful substances.
Compliance with Environmental Regulations
Catalytic converters and DPFs are essential for vehicles to comply with strict emissions standards set by environmental regulatory authorities. These components convert toxic gases like carbon monoxide, nitrogen oxides, and hydrocarbons into less harmful emissions like carbon dioxide and water vapour. Without catalytic converters and DPFs, vehicles would emit higher levels of pollutants, contributing to air pollution and posing health risks to individuals exposed to these emissions.
Moreover, many countries have mandated using catalytic converters and DPFs in vehicles to mitigate the adverse effects of vehicle emissions on the environment and public health. Therefore, vehicle owners must ensure that their cars have these components to adhere to legal requirements and contribute to environmental protection efforts.
Compatibility in Aftermarket Exhaust Systems
When considering upgrading to an aftermarket exhaust system for a vehicle, it is essential to ensure the new system is compatible with catalytic converters or DPFs. Some aftermarket exhaust systems may not include these components, which can lead to non-compliance with emissions standards and legal issues related to vehicle emissions.
Installing an exhaust system without catalytic converters or DPFs can increase emissions of harmful pollutants beyond permissible limits, thereby violating environmental regulations. In addition, vehicles lacking these essential components may fail emission tests, leading to fines or restrictions on vehicle usage until the necessary modifications are made.
By choosing an aftermarket exhaust system that includes catalytic converters or DPFs, vehicle owners can enhance their vehicle's performance and reduce their environmental impact. Ensuring compatibility with these emissions control devices is crucial for maintaining emissions standards and avoiding potential legal consequences associated with non-compliance.
Environmental Impact
An exhaust system without catalytic converters or DPFs can have severe environmental implications. Vehicles emit pollutants such as carbon monoxide, nitrogen oxides, and particulate matter, adversely affecting air quality and public health. These pollutants contribute to smog formation, respiratory problems, and environmental degradation, emphasising the importance of having catalytic converters and DPFs in vehicles.
By reducing the emission of harmful pollutants, catalytic converters and DPFs play a vital role in minimising the environmental footprint of vehicles and promoting sustainable transportation practices. Including these components in exhaust systems is essential for mitigating the adverse effects of vehicle emissions on the environment and ensuring a cleaner and healthier atmosphere for current and future generations.
8. Fitting an Aftermarket Exhaust
Aftermarket exhaust systems are popular upgrades for vehicle enthusiasts looking to enhance their car's performance and aesthetics. Unlike stock exhaust systems, aftermarket exhaust systems are designed to improve airflow, reduce back pressure, and boost horsepower and torque. However, to reap the full benefits of an aftermarket exhaust system, proper installation by experienced technicians is crucial.
Professional installation of an aftermarket exhaust system is essential for several reasons. Firstly, experienced technicians are familiar with the specific requirements of different vehicles and can ensure that the system is installed correctly. They have the expertise to address any challenges during the installation process, providing a seamless fit and optimal performance.
Improper installation of an aftermarket exhaust system can lead to various issues that jeopardise the vehicle's overall functionality. One common problem associated with incorrect installation is exhaust leaks. These leaks increase environmental pollution and pose a safety hazard by allowing harmful gases to enter the vehicle's cabin. Additionally, exhaust leaks can result in a decrease in performance and fuel efficiency, offsetting the intended benefits of the aftermarket exhaust system.
The long-term repercussions of improper installation can be costly. Fixing issues caused by a substandard installation can result in additional expenses that could have been avoided with proper installation in the first place. Therefore, prioritising quality installation by skilled technicians is essential to prevent avoidable costs and ensure that the aftermarket exhaust system functions optimally.
Vehicle owners can maximise the benefits of their aftermarket exhaust systems by opting for professional installation. A well-installed aftermarket exhaust system enhances the vehicle's performance and longevity. Proper installation helps avoid premature wear and tear on the exhaust components, extending the system's lifespan and reducing the likelihood of future repairs.
Quality installation of an aftermarket exhaust system can lead to improved overall performance and efficiency. When installed correctly, the system operates at its peak capacity, delivering the intended enhancements in horsepower, torque, and fuel efficiency. This, in turn, enhances the driving experience and ensures that the vehicle performs optimally in various road conditions.
9. How to Check the Quality of an Exhaust
When considering upgrading or replacing a vehicle's exhaust system, ensuring the new exhaust's quality is crucial. There are several key factors to consider to assess the quality of an exhaust system, whether it is an OEM or aftermarket option. By evaluating aspects such as the manufacturer's reputation, material quality, warranty coverage, and customer reviews, one can decide on the best exhaust system that suits their needs.
Reputation of the Manufacturer:
One of the primary factors to consider when assessing the quality of an exhaust system is the manufacturer's reputation. A manufacturer with a long history of producing high-quality exhaust systems is likelier to deliver a reliable product. Reputable manufacturers invest in research and development to ensure their products meet quality standards and provide optimal performance. When choosing an exhaust system, opt for manufacturers known for their expertise and commitment to quality.
Material Quality:
The material used in an exhaust system plays a significant role in determining its quality and longevity. High-quality exhaust systems are typically made from stainless steel, which offers durability and corrosion resistance. When evaluating an exhaust system, pay attention to the material thickness, as thicker materials tend to be more robust and less prone to damage. Additionally, consider the type of stainless steel used; 304 stainless steel is commonly preferred for its superior corrosion resistance compared to 409 stainless steel.
Warranty Coverage:
Warranty coverage is another essential aspect to consider when assessing the quality of an exhaust system. A comprehensive warranty reflects the manufacturer's confidence in their product and assures the consumer. Warranty terms may vary among manufacturers, so be sure to review the coverage period and what components are included.Â
A more extended warranty period often indicates a higher-quality product designed to last for an extended period.
Customer Reviews:
Customer reviews can offer valuable insights into the quality of an exhaust system. You can better understand its performance, durability, and potential issues by reading reviews from other vehicle owners who have installed the same exhaust system.Â
Look for reviews that mention the product's fitment, sound quality, and overall satisfaction of the customers. Remember that individual experiences may vary, but a pattern of positive or negative reviews can help you make an informed decision.
Inspecting the Exhaust System:
In addition to considering external factors, inspecting the exhaust system can provide valuable information about its quality and craftsmanship—attention to details such as welds, material consistency, and overall construction. High-quality exhaust systems feature clean and consistent welds with no signs of cracking or weakness. Uneven welds or inconsistencies in the material may indicate lower-quality manufacturing processes.
Conclusion
Before purchasing an aftermarket exhaust system, thoroughly considering the abovementioned factors is crucial to making an informed decision. From selecting suitable materials and components to ensuring proper installation and compatibility with emissions regulations, each aspect plays a significant role in the performance and longevity of the exhaust system.Â
By evaluating these ten key considerations, owners can confidently choose an aftermarket exhaust system that aligns with their vehicle's needs and preferences for enhanced performance and sound quality.
For more information about our exhaust systems at Shores NZ Fabrication, call or message us on 021 523 012.
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