This is a great exhaust system, built to perfection and super easy to install! Made the bike sound deeper and the carbon fiber looks sweet! Highly recommend this system
Purchased these as I have had prior FMF exhaust. As expected sounds great along with look sharp. Welds are good and clean. Pleased with them
I purchased this set for my 2017 Crf250 and they sound great! Installation was super quick and easy and has that great throaty low end sound I was looking for. Easily the loudest exhaust I’ve ever personally owned with the spark arrestors out. I will say with the Quiet core spark arrestors in I did lose quite a bit of top end but that was expected. Best purchase I’ve made for my bike by far!
2017 crf 450RX. After install I noticed a smoother low end throttle response. Bike didn’t seem as jerky. They also have a great throaty sound. The stock set up was too raspy for me.
this exhaust is great i love the sound of it and how much better my bike performs at races i would recound this to everyone that asked how i like this prodest
Installed this on my 2013 CRF450R as I wanted to keep the dual exhaust because it looks incredible and sounds even better. Louder than stock without the spark arrestors and that is exactly what I wanted. I removed the air filter screen and then had the local shop remap the ECU . It feels like a big increase in power but some of that may be just the great sounding motor.
This exhaust was the missing link on my 2013 CRF 450R. It made it more snappier and helped the bike pull better instead of flattening out. When I rode with it for the first time I knew immediatley my bike responded better.
To help us to find the correct parts, we will need to know the year, make, and model of your motorcycle.
Depending on the bike for which it is intended, the rear opening of the FMF 4.1 muffler can be between 1 1/4" to 1 5/8" / or 31.75mm to 41.275mm.
I regret that I don't know if the number 0.023 you referred to is inches, feet, millimeters, centimeters or a meter. 0.023 if an inch is less than the thickness of a sheet of paper. 0.023 of a millimeter is less than the thickness of a hair. 0.023 of a meter, or 2.3 centimeters, is less than one inch.
Just be sure to correctly select the Year/Make/Model of your ATV before ordering so we can be sure to send you the correct product for your ATV. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.