GrimmSpeed BB500 Turbocharger

I give it one star. It's almost impossible to fit. I had to grind to housing down just to get the tap to go on to the stud. I emailed grimmspeed sent the pictures where i had to modify their product and they firsted seemed concerned until I suggested milling the housing just a little more so it would fit, and they emailed me back with a long list of tools ( Everything but a socket) that I could use. "Make it user friendly!! " and all they need to do is mill a small part of the housing.