FMF Fact 4.1 Resonance Chamber Exhaust System for Husqvarna and Gas-Gas 450F Models

Upgrade your motocross bike with the FMF Fact 4.1 Resonance Chamber Exhaust System, designed specifically for select Husqvarna and Gas-Gas models including the 2018-2022 Husqvarna FC 450 and FX 450, as well as the 2021 Gas-Gas MC and EX 450F. This exhaust system features all-new technology incorporating the latest in resonance chamber design to maximize engine performance and sound quality. The patented core shape effectively lowers sound levels while maintaining maximum power output, ensuring both competitive performance and rider comfort.
Constructed with a patented canister shape, the system increases internal volume for more sound absorbing material, reducing unwanted noise and enhancing the overall exhaust note. The innovative chamber design refines exhaust pressure, contributing to improved throttle response and power delivery. Factory forward engineering centralizes mass for better handling and reduces the risk of damage during crashes. Additionally, the tuned exhaust with optimized core specifications ensures each application receives tailored performance benefits.
The system includes a titanium Megabomb for optimal power output, mounted with an easy-to-install rear endcap that allows straightforward insertion of tuning tip inserts or spark arrestors. Built from durable materials, this exhaust system is engineered for durability and high performance, making it an excellent upgrade for serious riders seeking to improve their bike’s efficiency and power. Whether for racing or recreational riding, the FMF Fact 4.1 offers a significant upgrade to your motorcycle’s exhaust system, combining advanced technology with reliable construction for peak performance.

Features:

• All-new resonance chamber technology for maximum performance and sound quality

• Patented core shape lowers sound levels while maintaining high power output

• Patented canister shape increases internal volume for enhanced sound absorption

• Chamber design improves exhaust pressure for better throttle response

• Factory forward engineering centralizes mass, reducing crash damage risk

• Tuned exhaust system with application-specific core specifications

• Innovative rear endcap allows for easy installation of tuning tip inserts or spark arrestors

• Titanium Megabomb included to optimize power output

Fits,
Gas-Gas EX 450F 2021
Gas-Gas EX 450F 2022
Gas-Gas EX 450F 2023
Gas-Gas MC 450F 2021
Gas-Gas MC 450F 2022
Gas-Gas MC 450F 2023
Husqvarna FC 450 2019
Husqvarna FC 450 2020
Husqvarna FC 450 2021
Husqvarna FC 450 2022
Husqvarna FC 450 Rockstar Edition 2018
Husqvarna FX 450 2019
Husqvarna FX 450 2020
Husqvarna FX 450 2021
Husqvarna FX 450 2022