have to agree best move i made taking my dump valve off,dont get me wrong im not a dump valve hater,actually quite liked having mine on,but my car ran better,idled better,came on boost harder and felt so much nicer to drive,no more jerkiness cruising at 30 when i removed mine,so it got binned

if you just want it for the noise fair enough i was 18 once myself for performance wise on an rst its just a gimmick