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FMF Factory-4.1 RCT Aluminum Silencer with Carbon End Cap
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FMF Factory-4.1 RCT Aluminum Silencer with Carbon End Cap

Our price: $331.99$404.99

MSRP: $349.99 - $449.99 - You save up to $45.00 (10% off)

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    There is no denying the FMF Factory 4.1 RCT Aluminum Silencer with Carbon End Cap is the cream of the crop when it comes to exhaust for your motorcycle.

    The quality is apparent right from the get go. The larger aluminum alloy body houses FMF’s unique Resonance Chamber Technology™ (RCT) at the front of the slip-on, which lowers decibels to ensure compliance with FIM 2M max sound tests and stringent AMA sound requirements.

    While the RCT lowers sound, it does more than just maintain your bike’s maximum output. The patented chamber design refines and enhances your exhaust pressure, giving you tunable gains throughout your rpm range. The carbon fiber end caps let you put these gains right where you need them with quick insert tuning tips or spark arrestors. Swapping between tips or servicing your exhaust won’t be a hassle since access is made easy with four screws on the end cap.

    Everyone knows FMF walks the walk and talks the talk. Quality components and extensive knowledge combine in the FMF Factory 4.1 RCT Silencer to make it a slip-on that will rock your dirt bike’s world.

  • Rapid Tuning System (RTS)
  • Fits on FMF or OEM header
  • Resonance Chamber Technology (RCT)
  • Increased packing material volume
  • Meets AMA and FIM sound requirements
  • Quiet Core 94db insert included
  • Spark arrestor included in muffler
  • 100% American made in California
  • Easily maintained and repacked

FMF Factory-4.1 RCT Aluminum Silencer with Carbon End Cap Reviews

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0 of 0 people found this review helpful.

needs the power bomb

Comments On Aug 23, 2015:used with a stock header I think this actually robs power on the low & mid side. High end it helps a little -not so beneficial for the woods.
Now add the power bomb header and it slightly increases the low & mid from stock but not enough to make it worth the cost.
Using with stock header it's super loud Using with he power bomb does quite it down a bit but is still loud. Luckily it comes with a noise/arrester insert.
For the money a big bore kit would be a better option for power. If you want something that looks cool and sounds cool you'll like it just don't forget the power bomb or it's a total waste of money

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0 of 0 people found this review helpful.

definite improvement over OEM

Comments On Aug 07, 2015:Sounds awesome which is a good thing in the thick woods & a non directional track. Greatly increased low & mid range power and throttle response over the OEM SX silencer.

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0 of 0 people found this review helpful.

Good, not great

Comments On Jun 10, 2015:Overall I'm pretty happy with this slip-on. It most definitely improves the sound by giving it a much louder and throatier sound compared to stock. I'm using it with the stock header, but I did remap the ECU after installation. I've got to say, I didn't feel THAT big a difference in power over stock. The bike definitely runs richer after the remap and it might pull a little longer overall after installing this slip-on, but it's not a night and day type thing. The only real negatives were the lack of any type of sealing gasket where the muffler slips on to the header pipe (had to use high temp gasket maker) and the fact that the can itself is not completely sealed where it is riveted together (i noticed some water being displaced from there upon start up after the first wash).

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0 of 0 people found this review helpful.

flying machine factory

Comments On Apr 06, 2015:Best pipe out there. It made a noticeable difference. love the look too

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0 of 0 people found this review helpful.


Comments On Jan 30, 2015:FMF has done it again !! Very nice !! The fit and finish was perfect. Clean look. Improved low end power. Thank you RM for great return policy and fast too..

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0 of 0 people found this review helpful.

Awesome Exhaust!

Comments On Jan 15, 2015:So much better sound, and definitely seems to be a bit more power. Using it with the FMF Power Bomb Header Pipe.

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1 of 1 people found this review helpful.


Comments On Jul 12, 2014:Oh Yeah! The install changed the stock tune so be prepared to buy a tuner. I have to run spark arrestor for many races and this one comes with it. The sound is not obnoxious and pretty close to stock. I'm very happy with this purchase.

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2 of 2 people found this review helpful.


Comments On May 06, 2014:Bought this for my ktm 350xcf 2014, gave it a nice extra power and extra sound to the bike.

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