Yoshimura RS-4 Slip-On Exhaust Muffler for Yamaha YZ450F & WR450F Models

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.

Upgrade your off-road performance with the Yoshimura RS-4 Slip-On Exhaust Muffler, designed specifically for Yamaha YZ450F, YZ450FX, and WR450F models from 2019 to 2022. Crafted from durable stainless steel, this exhaust system features a pentagonal-shaped muffler that not only enhances the bike's aesthetics but also improves exhaust flow. Its maximized internal volume and polyresonant duplex front chamber work together to increase power output while maintaining a refined sound level, giving you an edge on the trail. The stepped, two-stage core baffle optimizes sound suppression and performance, making this slip-on a versatile choice for serious off-road riders.

Features:

• Pentagonal-shaped muffler for optimized exhaust flow and distinctive styling

• Maximized internal volume to enhance exhaust efficiency and power

• Polyresonant duplex front chamber for improved sound quality and tone control

• Stepped, two-stage core baffle designed for balanced sound suppression and performance

• Spark Arrestor/Sound Insert Compatibility for versatile use and compliance

Product Type: Exhaust
Exhaust Type: Slip-On Muffler
Material: Stainless Steel
Styling: RS-4
Segment: Offroad
Division: Exhaust
Class: Mufflers, Pipes, & Systems
Sub Class: Mufflers, Silencers, Slip Ons

FITMENT:
2019 Yamaha WR450F
2019 Yamaha YZ450FX
2020 Yamaha WR450F
2020 Yamaha YZ450F
2020 Yamaha YZ450FX
2021 Yamaha WR450F
2021 Yamaha YZ450F
2021 Yamaha YZ450FX
2022 Yamaha WR450F
2022 Yamaha YZ450F
2022 Yamaha YZ450FX
2023 Yamaha WR450F
2023 Yamaha YZ450FX