FMF Racing® 044453 - Factory 4.1 RCT™ Slip-On Muffler

4 reviews|Item # mpn4618387340
Universal Fit
Fitment notes:
  • Not Vehicle Specific
Notes:
  • Remember to check your local or state laws regarding vehicle noise restrictions
  • This is a Race Only product that is to be used solely for competition. It cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws. Shipping Restriction: CA, NY, ME
Authorized Dealer
$584.99
In Stock (8)
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Vehicle Fitment

This part is universal

Specifications

Exhaust Type
Slip-On Muffler

Features

  • All new incorporating the latest in Resonance Chamber Technology
  • Patented core shape lowers sound level while maintaining maximum power output
  • Patented canister shape increases internal volume for more sound absorbing material
  • Patented chamber design to enhance and refine exhaust pressure
  • Factory Forward Engineering centralizes mass and is less prone to crash damage
  • Tuned exhaust with optimized core specifications for each application
  • Innovative rear end cap for simple installation of tuning tip inserts or spark arrestor
  • Titanium mid-pipe for extreme light weight
  • Designed for your exhaust system needs
  • Will deliver unparalleled performance
  • Exquisite workmanship and great longevity

Product Details

Universal Factory 4.1 RCT™ Slip-On Muffler by FMF Racing®. The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, FMF achieve a shorter overall length that is less susceptible to crash damage and complementary to FMF Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF exacting specifications and is manufactured 100% at FMF Southern California factory

Installation

Part Number:
044453

Reviews

(4)
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/5
1-4 of 4 Reviews
5 of 5
High-Performance Exhaust
This exhaust is shorter and lighter than my original muffler, and sits closer to the engine. My YFZ450R breathes easier with this exhaust, resulting in a significant power boost, especially at higher RPMs. And yeah, the carbon-fiber exhaust cap looks really cool.
FMF Racing® - Factory 4.1 RCT™ Slip-On Muffler
Posted by Kathleen (Washington Dc., DC) / May 06, 20192011 Yamaha YFZ450R
5 of 5
Moderate Sound and Performance
Easy-to-install product with a bit more powerful sound at low RPMs. Expected it to sound more aggressive at higher RPMs. Pleased with its finish and look.
Posted by Wali (Warr Acres, OK) / April 06, 20192018 Suzuki RMZ450
5 of 5
Sounds Perfect! Five Stars
I’m very pleased with the results. Installed this muffler without any problems. It fits exactly as described and provides a slight increase in top-end speed. And yes, it sounds really nice. Loud but not annoying. Just what I wanted!
FMF Racing® - Powercore 4™ Slip-On Muffler
Posted by James (Fort Worth, TX) / June 04, 20202018 Yamaha YFZ450R
5 of 5
Nice Product, Works As Described
What a nice exhaust! Very easy to install. Everybody can do it in less than 15 minutes. Looks stunning and gives a slight increase in performance. The sound is miraculous. It makes heads turn when I pass by.
FMF Racing® - Factory 4.1 SL™ 4-Stroke Silencer
Posted by Barbara (Minotola, NJ) / March 03, 20202005 Yamaha YFZ450

Questions and Answers

(0)
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