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.

Pentagonal-shaped muffler
Maximized internal volume
Polyresonant duplex front chamber
Stepped, two-stage core baffle
Spark Arrestor/Sound Insert Compatible

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Manufacturer SKU	231032D320
Manufacturer:	YOSHIMURA
Department	PAM-WPS
Show Stock	Yes
California Restricted Product:	No

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Year	Make	Model
2024-2024	Yamaha	YZ250F

Rs-4 Slip-on Ss/al/cf Yz250f

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