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Yoshimura Low Volume AMA Legal Insert Kit RS-2/RS-4 Mufflers



This item is available as a Blem/Refurb. These are items that cannot be sold as "New" merchandise and are limited to stock on hand. See the product details for a description of the product's condition.

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This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Yoshimura Low Volume AMA Legal Insert Kit RS-2/RS-4 Mufflers Resources

Yoshimura Low Volume AMA Legal Insert Kit RS-2 / RS-4 Mufflers


  • Replacement Low-Volume insert kit for RS-2/RS-4 mufflers
  • AMA legal 94 dB Insert
  • Inserts do not meet FIM closed-course/competition noise requirements
  • Non-Spark arrested
  • Decibel reduction depends on application

Kit Includes:

  • Low-Volume insert tube
  • End-cap collar
  • Set Screw 

Note: Please reference your Yoshimura exhaust schematic to select the proper size.

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Fitment Notes & Exceptions
This is a universal fit part; it may or may not fit without modification.
Product Style Item # Store SKU Manufacturer Product # Availability
Product Style RS-2 / 1.375" Inner Diameter Item # 1015750 Store SKU Manufacturer Product # INS-11-K Availability Out of Stock
Product Style RS-2 / 1.250" Inner Diameter Item # 1015819 Store SKU Manufacturer Product # INS-12-K Availability Out of Stock
Product Style RS-4 / 1.250" Inner Diameter Item # 1015817 Store SKU Manufacturer Product # INS-13-K Availability In Stock: Ships next business day