This weekend out quading I went into this deep water clay hole and my exhuast went under and when I came out my exhuast was really quiet but before I went into it sounded good so I took out my spark arrester and looked through and there was about 75% of the holes were filled in with the water clay mixture so I started my quad up and it sounds way better and louder with a throaty sound so im never going to put my spark arrester in again