yes i seen the clip, its the most BLATENT COMPRESSOR BACK SURGE I EVER HEARD, ssq dont make that noise, well the car does before the bov opens, dude u need to loosen the screw on your bov, this allows less tention on the spring behind the bov piston allowing bov to open easyier and at lower boost, (although can mess up your idle), dismantle the bov and relube it, cause they can start to stick,
anyone thats had a turbo car will know exactly wat i just said
THAT IS COMPRESSOR BACK SURGE FROM YOUR CAR
THAT IS NOT THE SOUND OF ANY BLOW OFF VALVE
ONLY NOOBS THINK THIS,, ITS A CLASSIC
go do some study or take your car to someone who actualy knows wat there on about, obviosly you dont,