The Pro Circuit T-4 Exhaust System is a tunable performance exhaust designed for select Honda CRF100F and CRF80F motorcycles. Manufacturer part number 4H01080 delivers a practical combination of improved exhaust flow, tunable performance, and controlled sound for riders seeking dependable upgrades for trail and recreational riding.
Built as a tunable version of Pro Circuit’s Ti-4R System, the T-4 features an RC-4 Resonance Chamber integrated into the head pipe to help reduce exhaust noise. Depending on the motorcycle year, the RC-4 Resonance Chamber may not be included with the system. Verify the included components and motorcycle application before installation.
Designed for fitment on 2004–2013 Honda CRF100F models as listed, along with the 2004 Honda CRF80F, this exhaust system is intended to provide application-specific compatibility. The product is also marketed for XR100R and XR80R models; confirm exact year and model compatibility with Pro Circuit or an authorized dealer before purchase. Professional installation is recommended to ensure correct mounting, sealing, and exhaust clearance.
Brand: Pro Circuit
Manufacturer Part Number: 4H01080
Vendor Part Number: 4H01080
Model: T-4 Exhaust System
Size: Motorcycle-specific replacement performance exhaust system
Features:
- Tunable performance exhaust system designed for select Honda motorcycle applications
- RC-4 Resonance Chamber helps reduce exhaust noise
- T-4 design based on the Pro Circuit Ti-4R System
- Fits 2004–2013 Honda CRF100F models as listed
- Fits 2004 Honda CRF80F
- Brand: Pro Circuit
- Manufacturer Part Number: 4H01080
- Vendor Part Number: 4H01080
- Model: T-4 Exhaust System
- Size: Motorcycle-specific system for Honda CRF100F and CRF80F applications
Fitment:
2001 Honda XR100R
2001 Honda XR80R
2002 Honda XR100R
2002 Honda XR80R
2003 Honda XR100R
2003 Honda XR80R
2004 Honda CRF100F
2004 Honda CRF80F
2005 Honda CRF100F
2005 Honda CRF80F
2006 Honda CRF100F
2006 Honda CRF80F
2007 Honda CRF100F
2007 Honda CRF80F
2008 Honda CRF100F
2008 Honda CRF80F
2009 Honda CRF100F
2009 Honda CRF80F
2010 Honda CRF100F
2010 Honda CRF80F
2011 Honda CRF100F
2011 Honda CRF80F
2012 Honda CRF100F
2012 Honda CRF80F
2013 Honda CRF100F
2013 Honda CRF80F