Mazdaspeed 3/6 Exhaust System Upgrade Guide
The Mazdaspeed 3/6 is a beloved platform among enthusiasts, known for its combination of practicality and performance. One of the most popular modifications to enhance your driving experience is by upgrading the exhaust system. In this blog, we'll discuss the importance of these upgrades, their benefits, and some top choices for Mazdaspeed 3/6 owners looking to unlock the true potential of their ride.
The Real Question is :
Why upgrade your Mazdaspeed 3/6 exhaust system ?
credit to Justin Brasil at Freektune
Before we dive into exploring aftermarket brands, it's essential to grasp the fundamental role of the exhaust system. The primary function of the exhaust system is to safely remove the exhaust gases produced during the combustion process in the engine. These gases, including carbon dioxide, nitrogen oxides, unburned hydrocarbons, and carbon monoxide, are harmful to both the environment and human health if released directly into the atmosphere. The OEM exhaust systems are typically designed to comply with environmental regulations and to control emissions. One of the major components that is installed in an exhaust system is a catalytic converter.
A catalytic converter is an essential component of a vehicle's exhaust system, tasked with reducing harmful emissions before they are released into the environment. It is ran through a series of chemical reactions that take place within its structure. Inside the catalytic converter, there are typically two main types of catalysts: reduction catalysts and oxidation catalysts. These catalysts are often made from precious metals such as platinum, palladium, and rhodium, which serve as active sites for chemical reactions.
Top Benefits of Upgrading Your Mazdaspeed 3/6 Exhaust System
1. Flow Restriction
The stock exhaust pipe often time fails to provide sufficient airflow due to the compact density of the catalytic converter, leading to poor exhaust gas flow. An upgraded exhaust system improves the flow of exhaust gases out of the engine, reducing backpressure.
2. Improvement in Performance
Upgrading to a high-performance aftermarket exhaust system can reduce exhaust restriction, optimize exhaust flow, and unlock additional horsepower and torque. This results in improved acceleration, better throttle response, better fuel economy, and an overall more engaging driving experience.
3. Increase Sounds
Enthusiasts often seek a more aggressive exhaust note to complement the Mazdaspeed's spirited performance. Factory exhaust systems prioritize noise reduction, resulting in a relatively subdued sound. Upgrading to an aftermarket exhaust system can unleash a deeper, more aggressive exhaust note, enhancing the experience of driving the Mazdaspeed.
4. Weight Reduction
Many aftermarket exhaust systems are constructed from lightweight materials such as stainless steel or titanium. By replacing the factory exhaust system with a lighter aftermarket alternative, enthusiasts can reduce the vehicle's overall weight, which can have a positive impact on suspension dynamics and ride quality.
5. Longevity & Durability
Rust accumulation is a common issue, especially living in regions with harsh weather conditions. The use of upgraded stainless steel exhaust systems, and thorough cleaning, especially during winter months, can help prevent rust and extend the lifespan of the exhaust system.
6. Supporting Future Modifications
An upgraded exhaust system is a fundamental modification that supports other performance upgrades. For instance, if you plan to install a larger turbo, intercooler, or intake system, a high-flow exhaust will help maximize the benefits of these modifications.
credit to Artem Arutyunov at Evolutionary Performance
After upgrading your Cat-back Exhaust system, enthusiasts tend to chase unlocking additional horsepower & torque, deeper sound, and better flow, by upgrading their downpipe. This is where we discuss whether you should upgrade your Downpipe to :Mazdaspeed 3/6: Catted vs. Catless Downpipes
credit to @jjms3
Choosing between a catted and catless downpipe for the Mazdaspeed involves balancing considerations such as emissions compliance, sound preferences, pricing, and performance objectives.
SOUND
- Catted: Tend to produce a milder exhaust note, suitable for daily driving without excessive noise.
- Catless: Typically produce a louder and more aggressive exhaust note, ideal for enthusiasts.
PERFORMANCE
- Catted: Modern high-flow catalytic converters minimize backpressure while reducing emissions.
- Catless: Offer the least exhaust restriction, resulting in greater exhaust flow and potentially higher horsepower and torque gains.
ODER
- Catted: Minimize strong exhaust odors by effectively converting harmful emissions.
- Catless: May result in stronger exhaust odors, particularly during cold starts or idling.
EMISSIONS
- Catted: Ensure compliance with emissions regulations, crucial for passing emissions testing.
- Catless: May not be legal for on-road use in regions with strict emissions regulations.
PRICE
- Catted: Generally have a higher price tag due to the presence of a catalytic converter.
- Catless: Typically more affordable as they lack a catalytic converter.
Best Aftermarket Exhaust Systems for Mazdaspeed 3/6
COBB Tuning Catback Exhaust
COBB Tuning is known for its high-quality aftermarket parts, and its Cat-Back Exhaust for the Mazdaspeed 3 is no exception. This exhaust system is constructed from robust stainless steel, ensuring longevity and resistance to corrosion. The design includes larger diameter piping than the OEM, which significantly enhances exhaust flow and turbo spool times. This results in a more mature, deeper tone exhaust that adds excitement to the driving experience which is suitable for those who daily drives their Mazdaspeed 3. The precise fitment of the COBB exhaust system ensures an easy and hassle-free installation. Performance-wise, the COBB exhaust delivers noticeable gains in horsepower and torque, typically in the range of 5-9 HP and TQ, along with better exhaust flow and turbo efficiency.
Corksport Catback Exhaust
The CorkSport Cat-Back Exhaust is a highly respected choice among Mazdaspeed 3 and Mazdaspeed 6 owners. Crafted from high-quality 304 stainless steel, Its piping ensures smooth and unrestricted exhaust flow, which enhances engine efficiency and power output. CorkSport are known for producing an aggressive yet refined exhaust note, providing a sporty sound that many enthusiasts appreciate. They provide multiple options for Mazdaspeed vehicles , including the true 3" piping which is suitable for those who are wanting to gain some power while still able to daily drive their vehicle . Additionally, the direct bolt-on design simplifies the installation process, making it accessible even for those with basic mechanical skills. Users can expect moderate gains in horsepower and torque, usually around 9-14 HP and TQ, and improved throttle response, making it a worthwhile investment for performance enthusiasts.
HKS Mazdaspeed 3 Gen1 Catback Exhaust
The HKS Hi-Power Cat-Back Exhaust is a top-tier choice for the Mazdaspeed 3 (Only Available for Gen 1) , especially for those seeking maximum performance. Known for its high-quality construction and lightweight materials, this exhaust system is designed to optimize performance.
CPE Catback Exhaust
The CPE Cat-Back Exhaust is known to be one of the best exhaust options for the Mazdaspeed 3 Gen2 with an aggressive sound and sporty exhaust note , which adds a dynamic element to the driving experience. CPE also offers them for the Mazdaspeed 3 Gen 1 and Mazdaspeed 6, known for its high-quality super polished stainless steel construction and performance-oriented design. This exhaust system features 18g heavy duty mandrel-bent piping that ensures smooth exhaust flow, resulting in significant performance gains. Installation is made easy with its direct bolt-on design. It offers noticeable gains in horsepower and torque, typically between 6-11 HP and TQ, and improved exhaust flow and turbo response.
Ultimate Racing Catback Exhaust
Ultimate Racing's Cat-Back Exhaust systems for the Mazdaspeed 3 and Mazdaspeed 6 are known for their high-quality materials and craftsmanship. These exhaust systems produce an aggressive exhaust note with deep tones, appealing to those looking for a more assertive sound contributing to significant performance improvements. Ultimate Racing exhaust systems are also customizable, with options for resonated or non-resonated versions to suit different preferences. Increased cabin noise may be drawbacks for some users. Nonetheless, users can expect substantial horsepower and torque improvements, usually around 6-13 HP and TQ, along with enhanced exhaust flow and throttle response.
Top Downpipes for your Mazdaspeed 3/6
COBB Tuning Mazdaspeed 3 Downpipe
COBB Tuning's downpipes for the Mazdaspeed 3 is only available in a catted version to ensure emission compliance reasons. They are known for their high-quality construction and performance enhancements. These downpipes feature a CAD designed cast turbo outlet to optimize maximum exhaust flow resulting in significant performance improvements. This downpipe also delivers notable horsepower & torque gains when paired with their intake & intercooler. It is redesigned for easy installation, ensuring a precise fit and enhanced durability on any Cat-Back Exhaust.
Corksport Mazdaspeed 3/6 Downpipe
Corkpsort Downpipes is available for both Mazdaspeed 3 ( 2007-2013 ) & Mazdaspeed 6. Corksport has tons of options of downpipes to choose from , whether you want your downpipe to be short or long , catted or catless , and fitment choices from 65mm to fit the stock Catback or 80mm to fit the Corkpsort Catback or even their new 3.5" to 3" Downpipe. Their V2 long downpipes design utilizes a cast stainless steel bellmouth with a v-band connection to 3” stainless steel piping for ease of installation. When choosing their downpipes , you'll expect to gain around 35-50 hp when paired with an intake or other components when installed. When choosing between catted & catless , choose wisely , as their catless downpipe is for off-road use only.
CPE Mazdaspeed 3/6 Downpipe
The CPE downpipe replaces the old factory pipe and its two restrictive cats with one high-flow cat and a 3″ mandrel bent pipe. The catalytic converter features a high-flow, all metallic honeycomb design, making it one of the most durable converters on the market. This design reduces backpressure, decreases turbo spool time, increases horsepower and offers a more aggressive sound. Keep in mind , when choosing the catless version , it is used only for track purposes. When it comes to pricing , the catless comes in a lower cost due to not having a catalytic converter.
Ultimate Racing Mazdaspeed 3 Downpipe
Ultimate Racing provides downpipes for the Mazdaspeed 3 that is both catted & catless that is a direct replacement for the stock downpipe. Their downpipes is made out of 304 stainless steel & offers a great deep tone and offer a great improvement in performance whether you choose catted or catless. Their design makes it easy for the enthusiasts to install their downpipe.
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Common Questions About Upgrading Exhaust Systems
Do I need a tune when upgrading the exhaust system or downpipe ?
When upgrading your Cat-back Exhaust System, it is not required to have a tune on your Mazdaspeed. This type of exhaust modification affects the sound and flow of exhaust gases "After" the catalytic converter, providing modest performance improvements without altering the engine’s air-fuel mixture significantly.
However, when upgrading your downpipe, the first thing a Mazdaspeed owner needs to prioritize before installing any downpipe is upgrading their HPFP ( High Pressure Fuel Pump ) & having a proper Tune. This is an extremely important step & required to maximize the efficiency of your vehicle and minimize the chances of having your vehicle running too lean or rich. Let's discuss why it's important to upgrade your HPFP & have a tune.
High Pressure Fuel Pump (HPFP)
Mazdaspeed engines when fitted with an aftermarket downpipe, will experience improved exhaust flow and reduced backpressure. This allows the turbo to spool faster and generate more boost, increasing the air entering the engine. Now to maintain the proper air-fuel ratio and ensure the engine operates efficiently, "More fuel is required". The stock HPFP may not be able to supply the necessary fuel at higher boost levels, leading to potential fuel starvation and engine knock. Upgrading the downpipe can push the stock HPFP beyond its limits, especially at higher RPMs and under heavy load. An upgraded HPFP ensures consistent fuel delivery, preventing fuel cuts that can cause hesitation, reduced performance, and possible engine damage.
Credit to Matt Buchanan for bringing out his Mazdaspeed to our shop.
Tune
When upgrading a downpipe on a Mazdaspeed 3, it is essential to get a tune because the increased exhaust flow can significantly affect the engine's air-fuel ratio and boost levels. The stock engine control unit (ECU) isn't optimized for these changes, leading to potential issues like running too lean, which can cause engine knock and damage. A tune recalibrates the ECU to manage the increased airflow, ensuring efficient combustion and maximizing performance gains in horsepower and torque. It also enhances throttle response and overall drivability, while preventing check engine lights by properly adjusting O2 sensor readings and emissions controls. Without a tune, the benefits of the downpipe upgrade won't be fully realized, and there's a higher risk of engine problems.
We will have another blog that discusses about the entire tuning process in a more broad way in the upcoming blogs. But for now, we appreciate you for stopping by and getting to know how the exhaust systems functions and why you need to upgrade yours.
Ready to Upgrade?
Explore our selection of high-performance exhaust systems and downpipes for your Mazdaspeed 3/6. Unleash the true potential of your vehicle today!
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