pro circuit ti-4 exhaust

7 replies to this topic
  • elcamino76

Posted May 28, 2006 - 05:30 PM


i have a 03 yz 450 and was wondering if i bought just the silencer-a pro circuit ti-4- if it would fit on to my stock head pipe. is any one running this set up or know if it will work/fit? i know they sell just the silencer so i would assume it will work but not sure. thanks

  • Satch0922

Posted May 29, 2006 - 04:46 AM


yes it will fit. I loved my PC pipe.....hits hard but MAN WAS IT LOUD!!!

  • del_scorcho

Posted May 29, 2006 - 09:04 AM


I have the t-4 silencer and it fit no problem.

Here's a pic back in '03 when I first put it on. http://i19.photobuck...o/Moto/PC_3.jpg

  • elcamino76

Posted May 29, 2006 - 11:38 AM


yeah looks nice. are u still using that pipe???? what kind of gains did u get with the slip on?? Was is louder or softer than stock?? Also where did u buy it?? thanks

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  • elcamino76

Posted May 29, 2006 - 11:39 AM


Also do you have to buy the one desegnated as a slip on or buy just the muffler and be ok??

  • bluestreak450

Posted May 30, 2006 - 10:16 AM


I have the GP system, but the silencer will work with the stock header. Make sure you get the right year model.

  • elcamino76

Posted May 31, 2006 - 12:01 PM


what does the "gp" stand for and do you think that i will have to re jet if i replace my stock silencer with the pro circuit ti?? thanks


Posted May 31, 2006 - 02:47 PM


what does the "gp" stand for and do you think that i will have to re jet if i replace my stock silencer with the pro circuit ti?? thanks

GP stands for "Grand Prix". It's a grand-prix motocross designed pipe. You won't have to rejet unless your jetting is already way off, however to get the most out of the pipe you will have to adjust your fuel screw, most likely. You have to replace the mid-pipe as well.


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