RS-9 Low-Volume Insert
Designed as a replacement low-volume insert kit for RS-9 mufflers, this package centers around a low-volume insert tube to support sound management needs on select applications that call for different sound restrictions.
Yoshimura · RS-9
The Yoshimura Sound Insert Kit RS-9 Muffler, 1.125" is a replacement low-volume insert kit designed for Yoshimura RS-9 mufflers. Built for riders who need an optional insert solution on applications that require different sound restrictions, this kit provides a straightforward way to configure an RS-9 muffler with a low-volume insert.
This kit is non-spark arrested, and the amount of decibel reduction will vary by application. For application confirmation, refer to the insert chart shown on the page and the installation PDF link provided.
Designed as a replacement low-volume insert kit for RS-9 mufflers, this package centers around a low-volume insert tube to support sound management needs on select applications that call for different sound restrictions.
This insert kit is specified as non-spark arrested. It is intended for use cases where a low-volume insert is desired without a spark arrester, based on the requirements of the specific application.
The kit includes the key components needed for installation: a low-volume insert tube, an end-cap collar, and a set screw. Pairing these pieces together supports a secure fit within the RS-9 muffler end-cap assembly.

Sound
Yoshimura’s INS-RS9C-K Sound Insert Kit is part of the Replacement Service Parts product line and is built specifically for RS-9 series mufflers. It is described as a replacement low-volume insert kit, and it can also be used as an optional kit on applications that require different sound restrictions. Because decibel reduction depends on the application, the most accurate way to confirm suitability is to use the insert chart referenced on the page.
Included
This kit is comprised of the components Yoshimura lists for the RS-9 low-volume insert configuration: a low-volume insert tube, an end-cap collar, and a set screw. These parts are intended to work together as a matched set for RS-9 mufflers, supporting correct placement and retention of the insert at the muffler outlet.
Installation
No specific vehicle fitment is provided in the product data, so application verification should be done using the insert chart mentioned on the page. An installation PDF is also available on the product page to guide the process. Since sound output changes can vary by application, confirming the correct insert selection for the muffler setup is an important step before installation.
| Part Number | INS-RS9C-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-9 |
| Shipping Weight | 0.35 lb |
| Barcode | 00840025908833 |
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
