First Impressions: Wow! This valve is amazing in every way. There are absolutely no drivability issues at all and no misfiring/backfiring. I can definately tell the difference in how it holds its boost. It seems like there is no more turbo lag and it starts to build immediately. When I felt the plastic bpv in my hand and then felt the turboxs I couldn't believe how crappy of a valve they put on our cars. Plus the best part is the sound of the pssst! I'm running my stock airbox because I didn't like the hiss of an intake and it sounds amazing. If anyone is looking for a great valve to run I would highly recommend this one! Plus it's pretty cheap, only $180.