Im going to get the yoshimura TRC comp slip on for my 04 yzf, I have 2 questions though. The yoshimura comes with a "96db spark arestor 2 piece end cap" apprently, some places say its a 96db end cap and some just say its a spark arrestor. They also sell the TEC kit that brings it down to 96db, so does it come with it or not? Second question, in my searching through the yoshimura post someone said instead of using the TEC kit in there yosh they used the Dr. D quiet core and it worked much better as far as not losing power while bringing down the DB's, will this work in the newer TRC (cone/tri-oval) yoshi's? Thanks.