RS4マフラー用 低容量インサートキット 1.500インチ FINISH INS-U-2

The low-volume insert slipped right in and cut the bark down enough to pass our sound check at the track without killing the tone. We’re running it on a tighter-noise street setup and it’s been spot on for the last two weekends. This kit was way easier than ordering the whole muffler.

Had to swap the standard insert for lower noise at my shooting range and this kit fit perfectly into my RS-4 muffler. The machining on the 1.500" piece is clean and it dropped right in without any filing or forcing.

Sounded like a race car before; now it's a nice deep rumble that doesn't wake the whole neighborhood. The insert slid right in and the decibel drop was noticeable even on my first idle test.