Pro Circuit T-4 Exhaust System 4S03125 for Suzuki DR-Z125 and DR-Z125L

The T-4 System is a tunable version of our more exotic Ti-4R System. RC-4 Resonance Chamber has been added to the head pipe to reduce noise. (The RC-4 Resonance Chamber, depending on year of your bike, might not come with the system.)

The Pro Circuit T-4 Exhaust System, manufacturer part number 4S03125 and vendor part number 4S03125, is a tunable performance exhaust designed for select Suzuki DR-Z125 and DR-Z125L motorcycles. Developed as a more accessible alternative to the Pro Circuit Ti-4R System, the T-4 system is engineered to improve exhaust flow and provide responsive performance for off-road and trail riding applications.

This system includes an RC-4 Resonance Chamber integrated into the head pipe to help reduce exhaust noise while maintaining the performance characteristics expected from Pro Circuit components. Depending on the motorcycle year, the RC-4 Resonance Chamber may not be included. The tunable design allows riders and technicians to tailor exhaust performance to specific riding conditions and preferences.

Fitment: This Pro Circuit T-4 Exhaust System fits 2003–2009, 2012, and 2013 Suzuki DR-Z125 models, as well as the 2003 Suzuki DR-Z125L. Verify the motorcycle year and model before installation to confirm compatibility, particularly regarding the inclusion of the RC-4 Resonance Chamber. Professional installation is recommended for proper alignment, secure mounting, and exhaust sealing.

Features:

• Performance exhaust system designed for Suzuki DR-Z125 and DR-Z125L motorcycles
• Tunable T-4 system derived from Pro Circuit's Ti-4R performance platform
• RC-4 Resonance Chamber added to the head pipe to help reduce exhaust noise
• RC-4 Resonance Chamber inclusion may vary by motorcycle year
• Fits 2003–2009, 2012, and 2013 Suzuki DR-Z125 models
• Fits the 2003 Suzuki DR-Z125L
• Brand: Pro Circuit
• Manufacturer part number: 4S03125
• Vendor part number: 4S03125

Fitment:
2003 Suzuki DR-Z125
2003 Suzuki DR-Z125L
2004 Suzuki DR-Z125
2004 Suzuki DR-Z125L
2005 Suzuki DR-Z125
2005 Suzuki DR-Z125L
2006 Suzuki DR-Z125
2006 Suzuki DR-Z125L
2007 Suzuki DR-Z125
2007 Suzuki DR-Z125L
2008 Suzuki DR-Z125
2008 Suzuki DR-Z125L
2009 Suzuki DR-Z125
2009 Suzuki DR-Z125L
2012 Suzuki DR-Z125
2012 Suzuki DR-Z125L
2013 Suzuki DR-Z125
2013 Suzuki DR-Z125L
2014 Suzuki DR-Z125L
2015 Suzuki DR-Z125L
2016 Suzuki DR-Z125L
2017 Suzuki DR-Z125L
2018 Suzuki DR-Z125L
2019 Suzuki DR-Z125L
2020 Suzuki DR-Z125L
2021 Suzuki DR-Z125L
2022 Suzuki DR-Z125L