サウンドインサートキット RS-4 マフラー 1.500インチリング (INS-21-K)

Was a bit wary of losing too much sound, but this insert kit dropped the noise just enough for my neighborhood without killing the tone. The ring fit snug into the RS-4 muffler and the swap was straightforward. Exactly what I needed for a quieter ride.

Took about ten minutes to swap the old insert for this low-volume kit, and the decibel drop is exactly what I needed for my quiet neighborhood. The ring fit snugly into the RS-4 without any wobble, and it’s held up through a couple of rides so far.

Had to swap out the stock insert for this low-volume kit because the noise at my track day was borderline. The 1.500" ring fit perfectly into my RS-4 muffler and definitely tamed the bark without killing all the tone.