FMF Factory 4.1 Slip-On Exhaust Honda CRF150R 2007-2014
  • FMF Factory 4.1 Slip-On Exhaust Honda CRF150R 2007-2014 - Titanium/Blue Titanium/Titanium
  • FMF Factory 4.1 Slip-On Exhaust Honda CRF150R 2007-2014 - Stainless Steel/Blue Titanium/Stainless Steel

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

Select Material:

$399.99 - $449.99
Savings (10%):

Select qty:

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

Video Reviews (2)

FMF Factory 4.1 Slip-On Exhaust Honda CRF150R 2007-2014 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 Slip-On Exhaust Honda CRF150R

With 30 years of racing experience behind it, the Factory 4.1 muffler takes advantage of everything FMF has learned on the race track. The patented core shape of the Factory 4.1 Slip-On enhances exhaust pressure for optimal power output while keeping sound levels to a minimum. The compact design not only makes this muffler less susceptible to crash damage, but also centralizes mass by keeping the weight of the muffler closer to the motor and center of gravity.


  • Horsepower gains throughout RPM range
  • High quality internal packing material for maximum longevity
  • Removable spark arrestor sold separately 
  • 94 dB quiet insert sold separately
  • 100% made in the USA


  • Titanium/Blue Titanium/Titanium 3.4 lbs
  • Stainless Steel/Blue Titanium/Stainless Steel 3.5 lbs
This Product Fits:
CRF150R 20072014
Product Style RevZilla Item # Manufacturer Product # Availability
Stainless Steel/Blue Titanium/Stainless Steel 894424 041289 Only 1 Left: Ships within 24 hours
Titanium/Blue Titanium/Titanium 894426 041291 Out of Stock


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 Slip-On Exhaust Honda CRF150R 2007-2014? 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 2 questions Browse 2 questions
No questions have been asked about this item. Be the first!