I have my gtm supercharger 1.5 kit for 3 years and after constant issues with sticking and leaking turbosmart bpv I switched to qrj early this year. Zero flutter, hasn't showed any signs of sticking or leaking. I am very happy customer. There was nothing worse than stock closed valve during your track/autocross day. I would take it apart and clean the turbosmart at least once a month but extreme temps during track days or autocross would get the valve stick at any time. I'd recommend to bite the bullet and get the qrj.
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