消音塞套件 94db RS-4S 排氣管，1.375 英吋 (INS-18-K)

The 94db rating is spot on for my RS-4 turn-out end cap—quieter than the stock setup but still has a solid bark. Kit fit the 1.375" opening without any fuss, and the non-spark arrested design was exactly what I needed for my trails.

I swapped out the stock baffle on my RS-4 muffler and this insert dropped right in—the 1.375" diameter fit perfectly. At idle it’s noticeably quieter, but under throttle you still get that crisp bark without rattling the neighbors. Great for tracks with strict sound limits.

Bolted these into my RS-4 turn-out end cap and the 94db rating is spot on, took the edge off without killing the tone. Fit was perfect on the 1.375" opening, no rattling even after a couple of hard rides.