I got bms intake and I like the sound, it depends what you like. With bms intake you just hear the diverter valve louder and maybe some hp increase at 18psi. It sound like whistle you get the idea. pressure being released or whatever it does but nothing like a fart lol.
JB4 S2 ISO Map7, BMS Intake, BMS Chargepipe, BMS Downpipe, BMS OCC, Flex fuel wires.