Yoshimura R&D of America, Inc.

SOUND INSERT KIT RS-12 Muffler, 1.625" (INS-31-K)

SOUND INSERT KIT RS-12 Muffler, 1.625" (INS-31-K) - Main image
$26.62 $40.95 In stock

Category: Replacement Service Parts

  • Replacement Low-Volume Insert Kit for RS-12 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.

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

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

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

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

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

View policy

Customer Reviews (5.0 / 5 · 5 reviews)

Ava ★★★★★

Took me about twenty minutes to swap out the old insert, and the fit on the 1.625" housing was snug without any filing needed. It's noticeably quieter at idle now, which is exactly what I needed for the neighborhood.

Steven ★★★★★

Installed this kit on my RS-12 and the decibel drop is noticeable—exactly what I needed for a quieter job site. The 1.625-inch fit was perfect for my setup, and installation took under 15 minutes.

Jason T. ★★★★★

I needed to quiet down my RS-12 for a local track day, and this insert kit fit perfectly into the 1.625" muffler. The non-spark arrested design was exactly what my setup required, and the install took less than ten minutes.

Related Products