I have a 1st gen dsm bov. Works perfect. It is bolted on to a flange that is welded (half metal to metal, half JB weld for air tight). The pipe is 2.5 inches. I boosted about 10psi on it for about a year with my gsr and it never leaked or failed on me. It's a little more hmt than others, but it works perfect. If you want, just keep the bov and throw away the pipe section lol. Asking $35 shipped. someone take this off my hands.