FMF Factory 4.1 RCT Slip-On Exhaust KTM / Husqvarna / Husaberg
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  • FMF Factory 4.1 RCT Slip-On Exhaust KTM / Husqvarna / Husaberg  - Stainless Steel/Aluminum/Carbon Fiber
  • FMF Factory 4.1 RCT Slip-On Exhaust KTM / Husqvarna / Husaberg  - Titanium/Titanium/Titanium
  • FMF Factory 4.1 RCT Slip-On Exhaust KTM / Husqvarna / Husaberg  - Titanium/Blue Titanium/Carbon Fiber
  • FMF Factory 4.1 RCT Slip-On Exhaust KTM / Husqvarna / Husaberg  - Stainless Steel/Aluminum/Stainless Steel
  • FMF Factory 4.1 RCT Slip-On Exhaust KTM / Husqvarna / Husaberg  - Titanium/Blue Titanium/Titanium

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MSRP
$374.99 - $499.99
Savings (10%):
$37.50
Price
$337.49

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Video Reviews (2)

FMF Factory 4.1 RCT Slip-On Exhaust KTM / Husqvarna / Husaberg 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 Slip-On Exhaust KTM / Husqvarna / Husaberg

If you are looking to drop weight, improve looks and most importantly improve your bikes power band then look no further. The FMF Factory 4.1 RCT Slip-On muffler was designed to bring out the hidden power potential in your machine by improving top-end pull and low-end torque. All 4.1 RCT mufflers are manufactured in FMF's Southern California factory using aerospace-grade materials that meet FMF's exacting specifications. A patented core shape enhances exhaust pressure for optimal power output while also lowering the sound level. 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 snap ring feature to keep the standard and optional inserts in place.

Features:

  • Massive power gains throughout the RPM range
  • Huge weight savings over stock exhaust
  • 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
  • 100% made in the USA

Weight:

  • Full Titanium 4.1 lbs
  • Titanium / Carbon end cap 4 lbs
  • Stainless Steel / Aluminum / Carbon end cap 4.4 lbs
  • Stainless Steel / Aluminum / Stainless Steel end cap 4.5 lbs
4.8 / 5
Bang For The Buck
5 / 5
Features
5 / 5
Style
5 / 5
Ease Of Install
5 / 5
Fit & Finish
4 / 5
Durability
5 / 5
This Product Fits:
Husaberg
FE250 2013, 2014
FE350 2013, 2014
FE501 2013, 2014
Husqvarna
FE250 2014, 2015, 2016
FE350 2014, 2015, 2016
KTM
250 SX-F 20092015
250 XC-F 20092015
250 XCF-W 20092015
350 SX-F 2011, 2012, 2013, 2014, 2015
350 XC-F 2011, 2012, 2013, 2014, 2015
350 XCF-W 2012, 2013, 2014, 2015
400 XC-W 2009, 2010
450 EXC 2009, 2010, 2011
450 EXC-R 2008
450 SMR 2013
450 SX-F 20072015
450 SX-F Factory Edition 2012, 2013, 2014
450 XC-F 2009, 2013, 2014, 2015
450 XC-W 20092010, 20122015
500 XCF-W 2012, 2013, 2014
500 XC-W 2013, 2014, 2015
505 SX-F 2008
505 XC-F 2008, 2009
530 EXC 2009, 2010, 2011
530 EXC-R 2008
530 XC-W 2009, 2010
Product Style RevZilla Item # Manufacturer Product # Availability
Stainless Steel/Aluminum/Carbon Fiber 1001810 045558 In Stock: Ships within 24 hours
Titanium/Titanium/Titanium 1001822 045559 In Stock: Ships within 24 hours
Titanium/Blue Titanium/Carbon Fiber 1001820 045561 In Stock: Ships within 24 hours
Titanium/Blue Titanium/Titanium 1001819 45560/045560 Out of Stock
Stainless Steel/Aluminum/Stainless Steel 1001815 045557 In Stock: Ships within 24 hours

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Returns

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.

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5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
2
0
0
0
0
Bang For The Buck
5.0 / 5
Features
5.0 / 5
Style
5.0 / 5
Ease Of Install
5.0 / 5
Fit & Finish
4.0 / 5
Durability
5.0 / 5
Bang For The Buck
5 / 5
Features
5 / 5
Style
5 / 5
Ease Of Install
5 / 5
Fit & Finish
4 / 5
Durability
5 / 5
Would buy again in a heartbeat!
I must say I am beyond impressed with this product. FMF has done an amazing job with the 4.1RCT exhaust. Bought this for my 2012 ktm 450xcw and it sounds amazing. Not only does it sound amazing but it looks amazing and certainly adds extra power. Its super easy to install (took less that 10 minutes.) The exhaust support holes didn't line up 100% but it was close enough for me to be able to put the 2 bolts through. If you're on the edge with buying one of these DO IT! You wont be disappointed. Revzilla did an amazing job with getting this to my door in 2 business days with just standard shipping! Unbelievable if you ask me. I will most definitely be buying from this company again.
January 18, 2017
Bang For The Buck
5 / 5
This product is what I was looking for.
I bought this for my snowbike. I was burning the heck out of my bibs when picking up my bike. The stock exhaust tip was so hot I have holes burnt into the hip portion. I have a burnt spot on my left knee from touching the exhaust when throwing a leg over the bike in deep snow. The price of new bibs is the same as this exhaust. I bought it hand I can touch it with a bear hand. No more burning expensive gear.
January 26, 2016
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Browse 11 questions Browse 11 questions and 1 answer
Does this muffler require re-mapping/re-jetting of the fuel system on a 2016 Husky FE 250 ?
A shopper on May 7, 2017