Upgrade the sound, performance, and appearance of your Mazdaspeed3 with the COBB 3″ Stainless Steel Cat-Back Exhaust System. Engineered specifically for the first-generation Mazdaspeed3, this exhaust delivers improved airflow, refined sound characteristics, and premium build quality tailored to the turbocharged MZR platform.
Constructed from mandrel-bent T304 stainless steel, the COBB cat-back offers excellent durability and corrosion resistance while maintaining an OEM-like fit. The system features a resonated straight-through design with a high-flow muffler to reduce exhaust restriction while preserving a deep, sporty tone that remains comfortable for daily driving.
The exhaust connects to the factory or direct-replacement downpipe using a stock-style donut flange, ensuring compatibility with OEM and aftermarket setups. A polished resonator section and straight-through muffler optimize exhaust flow and reliability, while a 3.5″ double-wall slash-cut tip with etched COBB logo completes the system with a clean, aggressive look.
Designed to meet SAE sound regulations, the COBB cat-back provides a subtle yet powerful exhaust note while staying within legal noise limits. The system is engineered as a direct bolt-on upgrade, requiring no cutting or permanent modifications and using factory mounting points for straightforward installation.
Whether you’re building a daily-driven Mazdaspeed3 or a performance-focused setup, the COBB 3″ cat-back exhaust delivers the perfect balance of sound quality, performance potential, and long-term durability.
Direct-fit cat-back exhaust for 2007–2009 Mazdaspeed3 (Gen1)
Full T304 stainless steel construction for durability and corrosion resistance
3″ mandrel-bent piping for improved exhaust flow
Resonated straight-through design with high-flow muffler
Stock-style donut flange compatible with OEM and aftermarket downpipes
3.5″ double-wall slash-cut exhaust tip with COBB logo
Refined, deep exhaust tone with minimal harshness
SAE sound-level compliant design
Bolt-on installation with factory mounting points
Vehicle: Mazdaspeed3 (Gen1)
Years: 2007–2009
The factory Mazdaspeed3 exhaust system is designed primarily for noise control and emissions compliance, which can restrict airflow under higher boost and load. A high-flow 3″ cat-back exhaust improves exhaust efficiency, enhances turbo response, and delivers a more engaging driving experience while maintaining daily-drivable sound levels.
Yes. This COBB 3″ cat-back exhaust is designed specifically for the first-generation Mazdaspeed3 (2007–2009). It will not fit second-generation (2010–2013) Mazdaspeed3 models.
No. This is a cat-back exhaust system, meaning it replaces the exhaust components from the catalytic converter back. It does not include a downpipe or catalytic converter.
The COBB system features 3″ mandrel-bent stainless steel piping, designed to improve exhaust flow and reduce backpressure compared to the factory system.
The exhaust is constructed from T304 stainless steel, providing excellent durability, corrosion resistance, and long-term performance in all driving conditions.
The COBB cat-back exhaust delivers a deep, sporty tone that is noticeably more aggressive than stock while remaining refined and daily-drivable.
Typical sound characteristics:
Idle: Deep and smooth
Acceleration: Aggressive but controlled
Highway: Minimal drone due to resonated design
Yes. By reducing exhaust restriction and improving flow, the COBB 3″ cat-back exhaust can support increased horsepower and torque, especially when paired with other modifications such as an upgraded downpipe or ECU tune. Actual gains vary depending on the vehicle setup.
Yes. The COBB cat-back exhaust is designed to work with the factory downpipe as well as most direct-replacement aftermarket downpipes.
No tuning is required to install or run this cat-back exhaust. However, tuning can help maximize performance when combined with other modifications.
Installation is straightforward and bolt-on. The system uses factory mounting points and included hardware.
Typical installation time:
Approximately 1 to 2 hours
Professional installation is recommended but not required.
No. Because this system does not modify catalytic converters or oxygen sensors, it will not trigger a check engine light.
Cat-back exhaust systems are generally legal for street use, but sound regulations vary by state and local laws. Always check local regulations before installation.
The COBB cat-back exhaust is engineered specifically for the Mazdaspeed3 platform and focuses on balanced performance, premium materials, and refined sound quality. Compared to many aftermarket systems, it offers a strong blend of performance potential, fitment precision, and daily drivability.
Upgrade the sound, performance, and appearance of your Mazdaspeed3 with the COBB 3″ Stainless Steel Cat-Back Exhaust System. Engineered specifically for the first-generation Mazdaspeed3, this exhaust delivers improved airflow, refined sound characteristics, and premium build quality tailored to the turbocharged MZR platform.
Constructed from mandrel-bent T304 stainless steel, the COBB cat-back offers excellent durability and corrosion resistance while maintaining an OEM-like fit. The system features a resonated straight-through design with a high-flow muffler to reduce exhaust restriction while preserving a deep, sporty tone that remains comfortable for daily driving.
The exhaust connects to the factory or direct-replacement downpipe using a stock-style donut flange, ensuring compatibility with OEM and aftermarket setups. A polished resonator section and straight-through muffler optimize exhaust flow and reliability, while a 3.5″ double-wall slash-cut tip with etched COBB logo completes the system with a clean, aggressive look.
Designed to meet SAE sound regulations, the COBB cat-back provides a subtle yet powerful exhaust note while staying within legal noise limits. The system is engineered as a direct bolt-on upgrade, requiring no cutting or permanent modifications and using factory mounting points for straightforward installation.
Whether you’re building a daily-driven Mazdaspeed3 or a performance-focused setup, the COBB 3″ cat-back exhaust delivers the perfect balance of sound quality, performance potential, and long-term durability.
Direct-fit cat-back exhaust for 2007–2009 Mazdaspeed3 (Gen1)
Full T304 stainless steel construction for durability and corrosion resistance
3″ mandrel-bent piping for improved exhaust flow
Resonated straight-through design with high-flow muffler
Stock-style donut flange compatible with OEM and aftermarket downpipes
3.5″ double-wall slash-cut exhaust tip with COBB logo
Refined, deep exhaust tone with minimal harshness
SAE sound-level compliant design
Bolt-on installation with factory mounting points
Vehicle: Mazdaspeed3 (Gen1)
Years: 2007–2009
The factory Mazdaspeed3 exhaust system is designed primarily for noise control and emissions compliance, which can restrict airflow under higher boost and load. A high-flow 3″ cat-back exhaust improves exhaust efficiency, enhances turbo response, and delivers a more engaging driving experience while maintaining daily-drivable sound levels.
Yes. This COBB 3″ cat-back exhaust is designed specifically for the first-generation Mazdaspeed3 (2007–2009). It will not fit second-generation (2010–2013) Mazdaspeed3 models.
No. This is a cat-back exhaust system, meaning it replaces the exhaust components from the catalytic converter back. It does not include a downpipe or catalytic converter.
The COBB system features 3″ mandrel-bent stainless steel piping, designed to improve exhaust flow and reduce backpressure compared to the factory system.
The exhaust is constructed from T304 stainless steel, providing excellent durability, corrosion resistance, and long-term performance in all driving conditions.
The COBB cat-back exhaust delivers a deep, sporty tone that is noticeably more aggressive than stock while remaining refined and daily-drivable.
Typical sound characteristics:
Idle: Deep and smooth
Acceleration: Aggressive but controlled
Highway: Minimal drone due to resonated design
Yes. By reducing exhaust restriction and improving flow, the COBB 3″ cat-back exhaust can support increased horsepower and torque, especially when paired with other modifications such as an upgraded downpipe or ECU tune. Actual gains vary depending on the vehicle setup.
Yes. The COBB cat-back exhaust is designed to work with the factory downpipe as well as most direct-replacement aftermarket downpipes.
No tuning is required to install or run this cat-back exhaust. However, tuning can help maximize performance when combined with other modifications.
Installation is straightforward and bolt-on. The system uses factory mounting points and included hardware.
Typical installation time:
Approximately 1 to 2 hours
Professional installation is recommended but not required.
No. Because this system does not modify catalytic converters or oxygen sensors, it will not trigger a check engine light.
Cat-back exhaust systems are generally legal for street use, but sound regulations vary by state and local laws. Always check local regulations before installation.
The COBB cat-back exhaust is engineered specifically for the Mazdaspeed3 platform and focuses on balanced performance, premium materials, and refined sound quality. Compared to many aftermarket systems, it offers a strong blend of performance potential, fitment precision, and daily drivability.
