I currently and have been running NGR Performance's Type S blow off valve. For those of you who are not familiar with it, it is simply an upgrade to the Greddy Type S, which is not for sale anymore.
The reason I am writing this review is because I commonly get asked what bov I am using and when I tell them they are uncertain of the "authenticity" of the product because it is not a Greddy.
Let me tell you folks, I have owned an ebay knock off, a Greddy Type S, and now the NGR Performance Type S. If you truly care how your car operates, and sounds, DO NOT buy an ebay knock off. Also, if you want to waste even more money, buy a used Greddy Type S that someone has beat on and come to the realization that the diagram is worn out.
My car has run far better since the install of this bov vs. the knock off and the Greddy, as it became worn out.
They now have stickers on the bov so that they are not mistaken for a knock off Greddy. If you still need the Greddy name, at least, buy one of their diagrams. You will thank yourself and me.
The link below is their site.
Click here for source dsmtuners.com 07-08-2010