Yoshimura R&D of America, Inc.

SOUND INSERT KIT RS-4D Muffler, BOTTOM, 1.000" (INS-BD-K)

SOUND INSERT KIT RS-4D Muffler, BOTTOM, 1.000" (INS-BD-K) - Main image
$21.86 $29.95 In stock

Category: Replacement Service Parts

  • Replacement Low-Volume Insert Kit for RS-4D Mufflers
  • Bottom outlet of RS-4D End-cap
  • Non-Spark Arrested
  • Available as optional kit on applications requiring different sound restrictions
  • Decibel reduction depends on application
  • Please see our Insert Chart to confirm fitment for your application
      • Kit Includes:
    • Low-Volume Insert Tube
    • End-cap collar
    • Set screw

*If you have any questions about fitment or applications, please call our Sales Department at 1-800-634-9166.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Julian ★★★★★

The decibel reduction was exactly what I needed for my setup, and the bottom outlet design fits the RS-4D end-cap perfectly. Took about ten minutes to swap out, no issues with the non-spark arrested build.

John S. ★★★★★

Installed this bottom insert on my RS-4D and the decibel reduction is exactly what I needed for a quieter work site. Fits the 1" outlet perfectly with no modifications.

Harper M. ★★★★★

The decibel reduction is exactly what I was after, and the bottom outlet fit my RS-4 end-cap perfectly without any extra parts. Installation took maybe ten minutes, and now the exhaust note is noticeably tamer without losing that deep tone.

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