Slip on, but the factory clamp does NOT work. I used a hose clamp and it worked. Good sound, and added power.
4#s lighter than stock and looks Great on the bike.
I put the pipe on my 2018 WR250R about a month ago, really easy to install, It bolted right up , the bike has more power than it had with stock pipe , Well worth the investment
I put this on my 2000 xr650l in June 2018. 6 months and 3000 miles later I am very pleased with this unit! I left the stock header pipe and added the Q4. The difference in the sound compared to the stock muffler is big! I love the way my xr
literally barks now! Not as quiet as advertised. Doesn't bother me.
I did bash it on a rock one day when I crashed on some single track trails. It's pretty tough so I can attest it's pretty sturdy. Just a scratch.
Buy it for your xr!!
Bought the fmf q4 for a 2014 wr250r. Wakes the bike up nicely!
The price was a bit crazy in my opinion $350 but other than that I have put around 500 miles on the fmf q4 so far on my 1998 klr 650 and I love the look of it, the sound is just right and it feels like the bike has a bit more power too! I'm glad I got the fmf q4 muffler.
Pipe fit great with no issues. Sounds great. Louder Han stock but not too loud. Also install the FMF joe-jet kit so not running lean
Good directions, easy install on Suzuki DRZ400S. Sound and noise level is good with spark arrester installed. Also installed K&N air filter and stage 2 jet kit. Good power increase in mid and high rpm.