SOUND INSERT KIT RS-12 Muffler, 1.375" (INS-32-K)

Name: SOUND INSERT KIT RS-12 Muffler, 1.375" (INS-32-K)
Brand: Yoshimura R&D of America, Inc.
SKU: INS-32-K
Price: 29.48 USD
Availability: InStock
Rating: 5.0 (5 reviews)

SOUND INSERT KIT RS-12 Muffler, 1.375" (INS-32-K) - Main image

$29.48 ~~$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.

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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 (5.0 / 5 · 5 reviews)

Joshua ★★★★★ Oct 23, 2026

Installed this kit on my RS-12 and the sound drop was exactly what I needed for a tighter noise ordinance area. The whole swap took maybe ten minutes with basic tools.

John ★★★★★ Oct 22, 2026

Needed a quieter setup on my RS-12 and this insert kit did the trick. The low-volume insert installs right into the existing muffler, no extra parts needed, and the decibel drop is noticeable on my rig.

Christopher L. ★★★★★ Oct 21, 2026

Was a little worried about fit, but this kit slipped right into the RS-12 housing without any extra parts needed. The muffler still lets you hear the engine, just tones it down to a neighbor-friendly level.