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Additional Videos

FMF Factory | Inside Look

How to - 2 Stroke Pipe Install

RM YouTube Channel


    The FMF SST is a 2-stroke pipe that uses new FMF technology to provide a large increase in overall power, better throttle response, and a linear power band. This makes the SST a great choice for high speed riding and times when you’re higher up in the rpms.

    The specifics behind the SST’s performance are in the sonic wave tech FMF puts into the pipe. Using a patent pending system of shaped bulges and cones near the stinger of the pipe, FMF says they’re able to produce a 10 to 13% increase in power.

    The pipe is still produced with the familiar FMF quality that includes quality stamping, precision welding, and a corrosion resistant nickel finish. Overall you can think of the SST like a combination of FMF’s Fatty and Rev pipes, making for some of the best overall power delivery available.

  • Increases horsepower between 10 and 13% in most cases
  • Extends over rev considerably
  • Increases mid-range
  • Sharpens throttle response for crisp reaction
  • More usable torque and tractability
  • Quality stamping and production process
  • Corrosion resistant nickel finish
  • Hand welded for accurate fitment
  • Can lower running temperatures
  • Patent pending pipe shape uses series of precise bulges and cones to refine/product power
  • Stinger section takes return exhaust wave and reflects a stronger force via a specially designed convergence cone.
  • Most models include new o-rings
  • Made 100% in the USA
WARNING: Cancer and Reproductive Harm -

FMF SST Pipe Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
4.6 / 5.0
35 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
SST review
I purchased the SST and had fatty before. I loved the SST because it didn't hit hard on bottom end so I ride on the higher end of the powerband so faster and smoother. Pipes that hit hard on bottom for me I tend to get off balance a little and not as smooth. If you are b rider or above the SST works well as you probably stay on the top end.

Machine this part was bought for: 2005 YAMAHA YZ125
February 22, 2016
Just not for motocross.
Would be a great pipe for the dunes . great mid-top. Bike falls off the pipe very easy on the track though.

Machine this part was bought for: 2008 YAMAHA YZ250
March 14, 2014
Port Angeles, WA, US
Age: 45-64
161 - 190 lbs.
5'7 - 5'9
Great Pipe
Noticable difference in power compared to stock. I also have Pro Circuit Pipe, but feels very similar to the SST.

Had quality issue with first SST. RMATV gave me a new pipe at no charge. Great Company

Machine this part was bought for: 2003 HONDA CR250R
October 26, 2013
2000 rm250
This pipe came on my rm when I bought it. I bought a used stock pipe to compare the them and the sst gave the bike a stronger over-rev with a smother bottom end. The stock pipe was more torquey in the bottom end and turned on sooner and signed off sooner. I decided to keep the stock pipe and sell the sst.

If you like shiney pipes and want more top end out of your bike and are willing to compromise some bottom end, this might be the right pipe for you. Remember, you don't get somethin for nothin.
October 24, 2013
Excellent pipe!
i noticed gains all they way up and the over-rev is nice for hole-shots.

Machine this part was bought for: 2007 HONDA CR250R
August 27, 2013
very good sound and give power
good product

Machine this part was bought for: 2008 SUZUKI RM250
June 10, 2013
Great Pipe
2008 300XC....Perfect fit...Rips on the top end....No noticeable loss on the bottom end....Well made
March 28, 2013
Not Impressed
I had this pipe on a 2007 cr250r. It was really hard getting on to fit the silencer compared to the fatty which I had on before this. I used this pipe for about a month and one time when I landed from a jump CLEANLY on a good landing the pipe completely snapped in 2 pieces on one of the welds near the skinny part of the pipe at the rear. After that I just went went back to the fatty again. The sst has a sort of welded attachment at the rear of the pipe and it makes it go on crooked and puts tension on it so it will most likely break again. The fatty doesn't have this and it goes right on easy with no tension and the power difference wasn't noticeable enough to mess with the SST again. I recommend the fatty but I havent tried the gnarly though.
February 27, 2013
This is a great pipe. It helped my bike performance wise and gave it a great sound and made it look mean.

Machine this part was bought for: 2003 HONDA CR125R
February 16, 2013
do they come as a pair

TECH NOTE: These will come as a pair.

Machine this part was bought for: 2004 YAMAHA BANSHEE 350
February 14, 2013
Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 3 answers
Do you guys have this pipe available for 2005 yz 125 ?
Robert B on Feb 7, 2019
BEST ANSWER: Yes, you will just need to enter in your make, model, and year.
Has fmf ever made a sst header pipe for a 2002 rm125?
A shopper on Feb 8, 2018
BEST ANSWER: No unfortunately this pipe in 02 was only listed for the KX65.
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