I ordered this and ended up not needing it. It is brand new in the box and never been used. Here are the specs:
Utilizing a uniquely engineered ball/spring mechanism combine with an adjustable bleed valve, the BC-HPBC allows you to spool your turbo to full boost up to hundreds of RPM faster than stock! The adjustable bleed mechanism lets you minimize the massive boost "spike" that can occur with poorly designed ball/spring manual boost controllers.
I will let it go for $100. I paid $135 for it new.