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FMF Factory-4.1 Silencer With SS Mid-Pipe
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FMF Factory-4.1 Silencer With SS Mid-Pipe

Our price: $343.99$386.99

MSRP: $399.99 - $449.99 - You save up to $63.00 (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

How To - Repack A Silencer For Your ATV Or Motorcycle

FMF Factory 4.1 RCT Sound Bite

RM YouTube Channel

Details

    FMF’s Factory 4.1 Silencer with Stainless Steel Mid Pipe is one of the best choices you can make when you want to keep your motorcycle or ATV running at peak performance. With the 4.1 you can expect to get a universal bump in performance that reaches across the entire rpm range. You’ll also get a hi-flo end cap that lets you tune the 4.1’s power with optional rev tubes and spark arrestors. The 4.1 isn’t just raw power though. FMF also prizes value and durability. It shows in the 4.1’s solid construction from excellent base materials and a precisely designed canister shape that maximizes internal packing volume to lower exhaust noise and extend service periods.

    So when you need a top-level slip-on to get your machine working just how you want it, choose the Factory 4.1 Silencer from FMF.

    Specs:
  • Tunable, spark arrestable silencer for your 4 stroke
  • Stamped with AMA approval for sound requirements
  • Aluminum canister body with stainless steel end cap and mid pipe
  • Easy bolt-on installation
  • Angle cut canister moves mass closer to center of machine
  • Hi-flo end cap accepts modular tuning inserts or spark arrestor

FMF Factory-4.1 Silencer With SS Mid-Pipe Reviews

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0 of 1 people found this review helpful.

great product

Comments On Jul 17, 2015:Well built, sounds great. spark arrestor was included which i wasn't sure of. love the tuning insert ability.

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0 of 0 people found this review helpful.

wow

Comments On Mar 12, 2015:Easy install, great sound, no problems

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0 of 0 people found this review helpful.

Low end torque!!!!

Comments On Feb 18, 2015:This thing is horse power in a box. A must have for hole shots! Great fit, high quality. It's loud, but in a good way!

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0 of 0 people found this review helpful.

fmf 4.1

Comments On May 12, 2014:what can I say about fmf. they are the top exhaust company for a reason. awesome sound and great performance gain and best price on rocky mountain. its a no brainer

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2 of 2 people found this review helpful.

WOW

Comments On Jun 22, 2013:this product is a great buy, bought it for my kx450 06, gave me more power, sounds crazy, and looks sick.. for the price I highly suggest to purchase the powerbomb header aswelll, i believe its going for 179.00, I am very happy with this product, except how FMF didnt supply me with a little bit of high heat silicone to seal the mid-pipe to the header, but besides that this is a great buy. full system your looking at 500-550.

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1 of 1 people found this review helpful.

super Awesome Product

Comments On Dec 12, 2012:Awesome Product

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1 of 1 people found this review helpful.

Amazing sound

Comments On Sep 23, 2012:It sounds amazing. it wasnt hard to instal,l very easy fit. It slipped right on, few screws, came with the nessicary spacers to make it fit just right. The sound is great, definity a good buy. Added power, will definity continue buying FMF parts. Thanks Rocky mountain ATV!

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2 of 2 people found this review helpful.

Loud!

Comments On May 30, 2012:Nice pipe, nice sound. Very loud but never ticketed or questioned.

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0 of 0 people found this review helpful.

Great set up

Comments On Apr 24, 2012:Super easy to install. Doesn't come with the lube stuff, but I put it on there with out it and it's been working great.

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0 of 0 people found this review helpful.

Added power and great sound

Comments On Mar 19, 2012:Love how easy to install, and sounds awesome!

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