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The Yoshimura RS-4 Full System Exhaust, part number 224500D320, is designed for select Honda CRF450X and CRF450L motorcycles. The system features a pentagonal-shaped muffler with maximized internal volume, a polyresonant duplex front chamber, and a stepped, two-stage core baffle.
This exhaust is compatible with a spark arrestor or sound insert. Fitment includes the 2019–2024 and 2025 Honda CRF450X, as well as the 2019–2021 Honda CRF450L. The manufacturer part number is 224500D320, and the vendor part number is 961-1215.
Features:
- Muffler Design: Pentagonal-shaped muffler
- Internal Volume: Maximized internal volume
- Front Chamber: Polyresonant duplex front chamber
- Core Baffle: Stepped, two-stage core baffle
- Compatibility: Spark arrestor and sound insert compatible
- Fitment: Fits 2019–2024 and 2025 Honda CRF450X models
- Fitment: Fits 2019–2021 Honda CRF450L models
Fitment:
2019 Honda CRF450L
2019 Honda CRF450X
2020 Honda CRF450L
2020 Honda CRF450X
2021 Honda CRF450L
2021 Honda CRF450X
2022 Honda CRF450X
2023 Honda CRF450X
2024 Honda CRF450X
2025 Honda CRF450X