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Pro Circuit - T-4 Exhaust System

T-4 Exhaust System

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Was $249.95 - $779.95 $219.99 - $686.99 You save up to $92.96 (12%)

Rating 4.75 of 5 (19 Reviews)

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Product Information

Pro Circuit T-4 Exhaust System
  • Pro Circuit's newest systems offer top-of-the-line performance and power
  • Improved power delivery and exhaust note
  • Body is made from lightweight 6061 T-6 brushed aluminum and the end cap and intake tube are stainless steel
  • Tunable end caps allow fine-tuning of power delivery for different types of riding and terrain
  • Silencers include wire-meshed spark arrestor that can be removed for closed-course racing
  • Steel Allen head screws make re-packing an easy task
  • Complete systems include stainless steel header
  • Exclusive E-glass pillow packing


  • Click Here for Additional Exhaust Information
  • Item # 6085
  • SKU #
  • Mfr. Part #

FitmentView All

Honda Models

  • CRF100F : 2004–2009, 2011–2013
  • CRF150F : 2003–2009, 2012–2016
  • CRF230F : 2003–2009, 2012–2016
  • CRF450R : 2009–2010
  • CRF70F : 2004–2009, 2011–2012
  • CRF80F : 2004–2009, 2011–2013
  • XR100R : 1986–2003
  • XR650R : 2000–2007
  • XR70R : 1998–2003
  • XR80R : 1986–1988, 1990–1991, 1993–2003

Kawasaki Models

  • KLX110 : 2002–2014
  • KLX110L : 2010–2014
  • KLX125 : 2003–2005
  • KLX125L : 2005
  • KLX140 : 2008–2009, 2011–2014
  • KLX140L : 2008–2009, 2011–2014

Suzuki Models

  • DR250 : 1990–1993
  • DR250SE : 1993–1995
  • DR350 : 1990–1999
  • DR350S : 1990–1993
  • DR350SE : 1994–1999
  • DR-Z110 : 2003–2005
  • DR-Z125 : 2003–2009, 2012–2013
  • DR-Z125L : 2003–2009, 2012–2015

Yamaha Models

  • TT-R110E : 2008–2009, 2011–2014
  • TT-R125 : 2000–2004
  • TT-R125E : 2003–2009
  • TT-R125L : 2000–2008
  • TT-R125LE : 2003–2009, 2011–2014
  • TT-R90 : 2000–2007
  • TT-R90E : 2003–2007
  • YZ450F : 2006–2009

Product Reviews 1 - 15 of 19

Overall Rating: 4.75 of 5

(19 Reviews)
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What Other Riders Are Saying...

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2007 CRF150F

You wont miss the stock pipe, this is an awesome amount of power and sound for the money.

Brandon - February 26, 2013

(Oakdale, CA)

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T4 exhaust

I got the T4 it has a different tip then in the picture.

Jake - September 21, 2012

(santa rosa, CA)

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Great Fit-A bit loud

We put this on a DRZ125 and it really woke the bike up; however, it is way louder versus the stock pipe which may cause some issues with our neighbors when the kids are riding on their pitbike track. The fit and finish was great and it installed perfectly.

davidm - July 7, 2011

(bartonville, IL)

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2003 KLX 125

It gave my bike better sound and lots more power.

Grant L. - May 13, 2011

(pasco, WA)

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Great exhaust system

Awesome deal, it put out more power, better sound and with a little grease it went on nicely. KLX 110 2005.

Danny J. - December 1, 2010

(Stratford, ON)

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Great exaust system

I think it was a great deal for my KLX110. It was an awesome present for my birthday, it gave more power and better sound and with a little grease it slipped together nicely.

Danny J. - November 30, 2010

(Stratford, ON)

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pro circuit t-4

I got this for Christmas and put it on a 2003 drz125. It fit nicely. It sounded a lot better and added some low end. Put this pipe, a K&N air filter and re-jet the carb and you have a good combination for low end power. I would recommend this to a friend because it is on the cheaper side of full exhaust systems and gave me more power.

spencer - June 4, 2010

(dayton, OH)

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Pro Circuit T4 Exhaust

Like the exhaust, had to bend the tabs slightly to get it to fit the Honda brackets but was easy install. Sounds great, little more power, looks good. Got T4 for my son's CRF 150, wish I had one on my CRF 230, guess I better save up!

Martin Miller - April 26, 2010

(whitmire, SC)

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ttr125 with t-4

Made a world of a difference for my bike. Would recommend it to anyone looking for more torque and overall speed.

dylan - March 10, 2010

(ballground, GA)

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CRF230F

Bought one with the exhaust already on it and rode my friend’s stock crf makes a difference in sound/power

Nishant - October 26, 2009

(Greenville, NC)

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Pro Circuit - T-4 Exhaust System

Excellent choice for the KLX140

Charles - October 8, 2009

(Bakersville, NC)

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Pro Circuit - T-4 Exhaust System

Just as expected.

David Manion - April 1, 2009

(Melbourne, FL)

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Pro Circuit Power

Great sounding system. Re-jetted and added the pipe, big power increase, perfect fit, worth every penny.

leroy - March 31, 2009

(indiana, PA)

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Nice Exhaust

I bought the T4 exhaust system for my CRF230F and it added a lot of power. It fits perfectly and sounds pretty good too.

Stephen - July 21, 2008

(Fort Yukon, AK)

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pro circuit t-4 exhaust system

Easy to install. Better sound than stock pipe but doesn’t have a deep enough sound for me. As far power it gives it more torque, but you can get the same thing from taking out the stock baffle from your factory pipe.

Johanthan - May 28, 2008

(Quinton, AL)
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