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FMF 044499 Factory 4.1 RCT 4-Stroke Slip-On Muffler

Manufacturer

Picture for manufacturer FMF

Part Number

044499
9 reviews
Sale Price

$933.60

Estimated ship date Saturday, November 28

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Fitment guaranteed

Fitment guaranteed

Product Details

The FMF Factory 4.1 RCT is a premium slip-on exhaust muffler engineered for four-stroke motocross and off-road motorcycles. Built to deliver measurable performance gains over the stock exhaust system, the Factory 4.1 RCT utilizes FMF's patented Resonance Chamber Technology (RCT) to broaden the powerband, improve throttle response, and increase overall horsepower and torque.

Constructed with a titanium outer sleeve and stainless steel end cap, the Factory 4.1 RCT is designed for riders who demand lightweight, race-ready performance without sacrificing durability. The muffler features a carbon fiber end cap option on select configurations, further reducing overall weight for competitive riding.

Key Features:

  • Patented Resonance Chamber Technology (RCT) for optimized power delivery across the RPM range
  • Lightweight titanium outer canister construction
  • Stainless steel perforated core for superior exhaust flow
  • Mid-pipe and mounting hardware included for straightforward installation
  • Increased horsepower and torque over stock exhaust
  • Race-proven design developed with professional FMF factory riders
  • Reduced overall weight compared to OEM muffler
  • Compatible with FMF PowerBomb and MegaBomb header pipes for full system performance

The FMF Factory 4.1 RCT (Part No. 044499) is a top choice for serious off-road and motocross riders seeking a direct bolt-on exhaust upgrade that delivers real, measurable performance improvements straight out of the box.

happy to have found this part I did a lot of searching both online and off before coming across this site

Items as described - Super fast ship!

Everything was smooth.

Mats have full interior coverage so dirt/water stay on the mat not on carpet floor.

Amazing experience shipped super fast!

Good price compared to most! Purchased Michelin Agilis HD Grip for my F-550

Extra Fees are high. Confirming my experience BEFORE I receive the order is deceptive.

The turbo (s475sx-e) has been my best purchase this year. The order was placed at the end of the workday and Thmotorsports shipped it the very next morning, also the box arrived in magnificent condition, the turbo was picture perfect without a blemish. Thmotorsports was the most affordable out of all ten sites that were considered, with top notch shipping. I have to say Thmotorsports was the best choice for my genuine part.

The product I ordered shipped, timely, and fit perfectly

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