Mazda 3 SP20-SP23-SP25 2.0-2.3-2.5 2004 to 2014 Performance Exhaust Headers [EXT462]
$687.27
Tax excluded
EXT462 Performance Headers – Mazda 3 SP20 / SP23 / SP25 (2004–2014)
EXT462 performance headers are engineered for Mazda 3 SP20, SP23 and SP25 LF/L3 engines, replacing the restrictive factory manifold to increase exhaust flow, throttle response and mid-range performance. Australian-made and mandrel-bent, these headers suit 2.0L, 2.3L and 2.5L models with strong, reliable fitment. SP25 models require O2 sensor extensions and a replacement catalytic converter. Click image for larger view and more images
EXT462 Performance Headers – Mazda 3 SP20 / SP23 / SP25 (2004–2014)
The EXT462 header system is designed for Mazda 3 LF/L3 engines found in the SP20, SP23 and SP25. These engines respond extremely well to improved exhaust scavenging, and the EXT462 delivers a smoother, faster-flowing system compared to the factory catalytic converter manifold.
Australian-made using mandrel bends, precision welds and a performance-oriented collector, this header set boosts mid-range torque, throttle response and overall engine efficiency.
Key Features
- Check availability before ordering
- Direct-fit performance header for Mazda 3 2004–2014
- Mandrel-bent primary, secondary and outlet pipes
- Improved exhaust scavenging for stronger torque
- Precision flanges reduce leak risk over factory manifold
- Australian-made quality built for long-term reliability
Technical Specifications
- Primary Pipes: 42mm [1.58"]
- Secondary Pipes: 51mm [2.00"]
- Outlet Size: 63mm [2.50"
- Material: Mandrel-bent steel
- Gasket: Reuse original
Fitment Notes
- SP25 requires O2 sensor extensions
- Replacement catalytic converter required
- Alway check rear lower engine mounts to ensure long service life of flexible joints.
Engine Airflow (Verified)
On average, a Mazda 2.0L LF engine draws ~3,400 L of air per minute and expels ~10,100 L per minute at 4000 rpm [@600 °C].
On average, a Mazda 2.3L L3 engine draws ~3,910 L of air per minute and expels ~11,650 L per minute at 4000 rpm [@600 °C].
On average, a Mazda 2.5L L5 engine draws ~4,250 L of air per minute and expels ~12,650 L per minute at 4000 rpm [@600 °C].
In the Box
- 1 x EXT462 Header Assembly
Recommended With
- Replacement catalytic converter (SP25 models)
- O2 sensor extension harness
Customer Support
For phone orders, advice, or part enquiries – contact us:
📞 Call Now: +61 2 9547 3511 ✉️ Email Us
🇦🇺 Best Mufflers
87A Planthurst Road, Carlton NSW 2218, Australia
Exhaust Systems Since 1983
EXT462
EXT462 Performance Headers – Mazda 3 SP20 / SP23 / SP25 (2004–2014)
EXT462 performance headers are engineered for Mazda 3 SP20, SP23 and SP25 LF/L3 engines, replacing the restrictive factory manifold to increase exhaust flow, throttle response and mid-range performance. Australian-made and mandrel-bent, these headers suit 2.0L, 2.3L and 2.5L models with strong, reliable fitment. SP25 models require O2 sensor extensions and a replacement catalytic converter. Click image for larger view and more images