Yoshimura R&D of America, Inc.

SOUND INSERT KIT 94db RS-4 Muffler, 1.375" (INS-16-K)

SOUND INSERT KIT 94db RS-4 Muffler, 1.375" (INS-16-K) - Main image
$27.03 $40.95 In stock

Category: Replacement Service Parts

    • Replacement Low-Volume Insert Kit for RS-4 Mufflers
    • 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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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)

Mia G. ★★★★★

Swapped out the stock insert on my RS-4 and this 94db kit took the edge off the bark without killing performance. The fit was perfect on the 1.375" muffler and it took less than ten minutes to install. Exactly what I needed for a quieter ride without going too restrictive.

Eli D. ★★★★★

Took a chance on the 94db insert since I needed a sound restriction option, and the fit on my RS-4 was spot-on. The kit comes as a non-spark arrested setup, which is exactly what I wanted for my local track rules. Quieted things down noticeably without choking the flow, and the install took about te

Emily ★★★★★

I needed to bring the noise level down on my RS-4 and this insert kit was the perfect solution, dropping the volume just enough to be legal at my local track. Installation was straightforward, though I wish the instructions had been included in the box.

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