FMF Factory 4.1 RCT Exhaust System Yamaha YZ250F / YZ250FX / WR250F 2014-2017
  • FMF Factory 4.1 RCT Exhaust System Yamaha YZ250F / YZ250FX / WR250F 2014-2017 - Titanium/Blue Titanium/Carbon Fiber
  • FMF Factory 4.1 RCT Exhaust System Yamaha YZ250F / YZ250FX / WR250F 2014-2017 - Stainless/Aluminum/Carbon Fiber

Please select a Material to check availability, or to add this item to your Shopping Cart or Wish List.

Select Material:

$799.99 - $1,049.99
Savings (10%):

Select qty:

Please select a Material to view availability.
Add to Wish List

Video Review

FMF Factory 4.1 RCT Exhaust System Yamaha YZ250F / YZ250FX / WR250F 2014-2017 Videos

This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

FMF Factory 4.1 RCT Full Exhaust Yamaha YZ250F / YZ250FX / WR250F

The FMF Factory 4.1 RCT full system is constructed from aerospace-grade materials that meet FMF's exacting specifications and is 100% manufactured in their Southern California factory. The patented MegaBomb header design allows exhaust gases to expand, cool and ramp back up at a higher velocity. This results in torque gains typically associated with longer headers, and the healthy over-rev of a short header. The muffler itself is shorter than OEM mufflers, making it less susceptible to crash damage and complements the centralized mass design by moving it closer to the motor. The rear end cap was engineered for fast and easy tuning by utilizing a retaining ring to keep the standard and optional inserts in place.


  • Massive power gains throughout the RPM range
  • Huge weight savings over stock exhaust
  • RTS (Rapid Tuning System) for quick and easy track-side tuning
  • Removable spark arrestor included
  • Quiet insert sold separately 
  • Meets AMA and FIM sound requirements 
  • 100% made in the USA


  • Stainless Steel / Aluminum / Carbon end cap 7.3 lbs
  • Titanium / Carbon end cap 5.4 lbs
This Product Fits:
WR250F 2015, 2016, 2017
YZ250F 2014, 2015, 2016, 2017
YZ250FX 2015, 2016, 2017
Product Style RevZilla Item # Manufacturer Product # Availability
Titanium/Blue Titanium/Carbon Fiber 1001590 044431 In Stock: Ships within 24 hours
Stainless/Aluminum/Carbon Fiber 1001630 044430 Available: Requires 1-3 business days lead time prior to shipment


Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.


If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
There are no reviews for this item. Write Review
Use our Product Q&A for a chance to win our monthly $100 giveaways.

Have a functionality, fit, or otherwise product-specific question about the FMF Factory 4.1 RCT Exhaust System Yamaha YZ250F / YZ250FX / WR250F 2014-2017? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions
Will a 2015 power core silencer fit on a 2017 wr250f?
A shopper on Apr 27, 2017
How does it sound on a yz205f 2015?
A shopper on Aug 22, 2016