Current Top Sellers
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
The FMF Factory 4.1 slip-on exhaust is the same exhaust that professional racers use to bring home championships around the world. The technology in this slip-on exhaust cannot be found in any other exhaust. Since the Factory 4.1 slip-on exhaust is meant to be used for competition, FMF made this pipe ready to take to the track straight out of the box.
- Massive power gains throughout the RPM range
- Huge weight savings over stock exhaust
- Anodized titanium midpipe
- Carbon fibre end cap
- RTS (Rapid Tuning System) for quick and easy trackside tuning
- Removable spark arrestor included
- Quiet insert included (94db)
- Can be used with FMF or stock OEM Header
- Used by BTO Sports KTM, JGR Toyota Yamaha, NFab Yamaha, Rockstar Energy Racing KTM
- 100% made in the USA
- Titanium / Carbon end cap 1.81kg (4bs)
- KTM 250 EXC-F 2008 - 2016
- KTM 250 SXF 2009 - 2015
- KTM 350 EXC-F 2012 - 2016
- KTM 350 SXF 2011- 2015
- KTM 450 EXC-F 2008 - 2016
- KTM 450 SXF 2007- 2015
And the following Husvarna models:
- Husqvarna FE250 2014 - 2016
- Husqvarna FE350 2014 - 2016
Shipping and Returns
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.