i foudn this video on you tube this guy works for synapse engineering and he has a synchronic piston blow off valve and he compares it to the hks ssq and it is alot mroe responsive, i thought it was cool and i might even buy because it works alot better. try to find it on you tube synapse engineering he has it on a turbo s2000 synapse won award at sema for best new porduct for their wastegate
