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Pro Circuit T-4 Exhaust System Yamaha TT-R125 2000-2015

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This item is available as a Blem/Refurb. These are items that cannot be sold as "New" merchandise and are limited to stock on hand. See the product details for a description of the product's condition.

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This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Pro Circuit T-4 Exhaust System Yamaha TT-R125

The Pro Circuit T-4 Exhaust System is designed to increase performance and provide more usable power throughout the entire RPM range. The stainless steel and aluminum construction offers increased strength and durability which is ideal for racing and most off-road riding conditions.

The T-4 muffler is also tunable, meaning you can remove the spark arrestor screen turning it into a race tip for closed course racing. The Pro Circuit RC-4 Resonance Chamber head pipe is included on select models and was designed to further reduce noise output by acting as a pre-muffler.

If you have been searching for a value priced complete exhaust system but are not willing to sacrifice performance, the Pro Circuit T-4 pipe is sure to fit the bill.


  • Removable USFS approved spark arrestor
  • Stainless steel head pipe, mid pipe and end-cap
  • Brushed aluminum canister
  • Strong aluminum mounting bracket
  • TIG welded
  • Designed for easy disassembly and re-packing when needed
  • Lighter then most OEM systems
  • 100% Made in the USA
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This product is vehicle specific. Click here to select your vehicle to ensure fitment.

This Product Fits:

TTR125 2000-2015

This item is also available for 55 other models:

CRF100F 2004-2013
CRF150F 2003-2005
CRF150F 2006-2018
CRF230F 2003-2018
CRF250R 2010
CRF450R 2008
CRF450R 2009-2010
CRF450R 2011
CRF50F 2004-2023
CRF70F 2004-2012
CRF80F 2004-2013
XR100R 2001-2003
XR100R 1985-2000
XR50R 2000-2003
XR650R 2000-2007
XR70R 1998-2003
XR80R 2001-2003
XR80R 1985-2000
TC250 2010
450 SX-F 2011-2012
KLX110 2010-2020
KLX110 2002-2009
KLX110L 2010-2020
KLX110R 2021-2023
KLX110R L 2021-2023
KLX125 2003-2006
KLX125L 2003-2006
KLX140 2008-2020
KLX140G 2017-2020
KLX140L 2008-2020
KLX140R 2021-2023
KLX140R F 2021-2023
KLX140R L 2021-2023
KLX450R 2008
KX250F 2004-2008
KX450F 2006-2008
DR250 1990-1992
DR350 1993-1999
DR350S 1990-1999
DR-Z110 2003-2005
DR-Z125 2003-2016
DR-Z125L 2003-2023
RMZ250 2007-2009
RMZ250 2010
RMZ450 2007
RMZ450 2008-2009
RMZ450 2011
TTR110 2008-2015
TTR90E 2000-2007
WR250R 2008-2018
WR250X 2008-2011
YZ250F 2007-2009
YZ250F 2010-2011
YZ450F 2006-2009
YZ450F 2010-2011
Product Style Item # Store SKU Manufacturer Product # Availability
Product Style Stainless Steel/Aluminum/Stainless Steel Item # 1016867 Store SKU Manufacturer Product # 4Y00125 Availability Out of Stock
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