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FMF Factory-4.1 RCT Dual Aluminum Silencers with Carbon End Caps
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FMF Factory-4.1 RCT Dual Aluminum Silencers with Carbon End Caps

Our price: $601.99

MSRP: $699.99 - You save up to $98.00 (14% off)

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  • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

    -Dan Thomas, CEO and Founder

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Additional Videos

FMF Exhaust - Full System Installation - 2013 Honda CRF450R

FMF Factory 4.1 RCT Sound Bite

RM YouTube Channel


    What’s better than new exhaust? How about new dual exhaust from FMF?

    Maybe it’s something only CRF riders truly understand. But there is no denying that the FMF Factory 4.1 RCT Dual Aluminum Silencers with Carbon End Caps are the cream of the crop when it comes to exhaust for your late model CRF. The quality is apparent right from the get go. The aerospace-grade aluminum body gets a bump in volume to give you more packing material and a longer-lasting, low-decibel sound output. FMF also uses unique Resonance Chamber Technology™ (RCT) at the front of their slip-ons to ensure compliance with the FIM 2M max sound test and meet stringent AMA sound requirements.

    The RCT design not only maintains your CRF’s maximum output, but 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 by allowing you to quickly insert a tuning tip or spark arrestor. Swapping between tips or servicing your exhaust also won’t be a hassle since access is made easy with four screws on the end cap.

    Anyone who knows exhaust knows FMF walks the walk and talks the talk. Quality components and extensive knowledge combine in the FMF Factory 4.1 RCT Dual Silencers to make a set of slip-ons that will rock your CRF’s world.

  • Carbon fiber end cap
  • 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
  • 100% American made in California

FMF Factory-4.1 RCT Dual Aluminum Silencers with Carbon End Caps Reviews

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0 of 0 people found this review helpful.

Quality product

Comments On May 11, 2015:FMF has always impressed me with their high quality products and this is no different. Fit was perfect.

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2 of 2 people found this review helpful.

just what it needed

Comments On Sep 24, 2014:Gave my 450 the low end hit it needed. You can also lug gears lower over the stock exhaust. I added the jd power surge fuel tuner with the exhaust system, great combo. Cant go wrong with either product.

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