Description

RS-4 exhaust systems illustrates the endless cycle of development. Working in conjunction with the factory teams has provided us with new ways to increase performance, lower sound levels and centralize mass. The end result is a product that gives you an unparalleled competitive advantage.

The Yoshimura RS-4 exhaust system offers a blend of performance enhancement and sound management, designed specifically for select Husqvarna and Gas-Gas 450F models. Developed in collaboration with factory teams, this system focuses on increasing power output, reducing sound levels, and centralizing mass for better handling and performance. The exhaust features a pentagonal-shaped muffler that not only provides a distinctive look but also maximizes internal volume for improved airflow and efficiency. Its polyresonant duplex front chamber and stepped, two-stage core baffle work together to optimize sound and performance, ensuring a balanced and aggressive exhaust note. This system is compatible with spark arrestors and sound inserts, allowing customization for different riding environments and noise regulations.

Features:

• Pentagonal-shaped muffler for a unique aesthetic and efficient airflow

• Maximized internal volume to enhance performance and exhaust flow

• Polyresonant duplex front chamber designed to improve sound quality and reduce noise levels

• Stepped, two-stage core baffle for optimized performance and sound tuning

• Spark arrestor and sound insert compatibility for customizable noise control

Fitment:
Gas-Gas EX 450F2021
Gas-Gas EX 450F2022
Gas-Gas EX 450F2023
Gas-Gas MC 450F2021
Gas-Gas MC 450F2022
Gas-Gas MC 450F2023
Husqvarna FC 4502019
Husqvarna FC 4502020
Husqvarna FC 4502021
Husqvarna FC 4502022
KTM 450 SX-F2019
KTM 450 SX-F2020
KTM 450 SX-F2021
KTM 450 SX-F2022
KTM 450 XC-F2019
KTM 450 XC-F2020
KTM 450 XC-F2021
KTM 450 XC-F2022