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 Slip-On Exhaust system is engineered to deliver exceptional performance enhancements for select Husqvarna and KTM adventure motorcycles. Designed in collaboration with factory teams, this exhaust offers a perfect balance of increased power, reduced sound levels, and centralized mass for improved handling and control. Crafted from high-quality materials, it ensures durability and consistent performance on and off the road.
Constructed with a pentagonal-shaped muffler, the RS-4 features a maximized internal volume that optimizes exhaust flow and enhances engine efficiency. The polyresonant duplex front chamber works to smooth out exhaust pulses, contributing to a more refined sound profile and improved throttle response. Its stepped, two-stage core baffle further enhances performance by managing sound and backpressure, making it suitable for riders seeking both performance and compliance with noise regulations.
This slip-on system is equipped with a spark arrestor/sound insert compatibility, allowing customization based on riding environment and local regulations. The design ensures easy installation and a seamless fit on models including the 2022 Husqvarna Norden 901, 2020-2023 KTM 790 and 890 Adventure series, providing a significant upgrade over stock exhausts. Whether you’re racing or exploring, the Yoshimura RS-4 exhaust helps you unlock the full potential of your motorcycle while maintaining a sleek, aggressive look.

Features:

• Pentagonal-shaped muffler for efficient exhaust flow

• Maximized internal volume for improved performance

• Polyresonant duplex front chamber for smoother sound and response

• Stepped, two-stage core baffle for sound management and backpressure control

• Compatible with spark arrestor and sound insert for customizable riding environments

Fitment:
Husqvarna Norden 9012022
Husqvarna Norden 9012023
KTM 790 Adventure2019
KTM 790 Adventure2020
KTM 890 Adventure2022
KTM 890 Adventure2023