Go Fast Bits Hybrid BOV
 

How would this fit/work on a Miata? Does anyone have experience with a GFB BOV?

I have only heard great things about them, but I cant seem to find some solid info on how they'd fit?

Did you visit their website? It was the first google hit for "go fast bits hybrid".
Go Fast Bits 2008

Seems like a pretty straightforward product, like 100 other ones exactly like it that can be either VTA or recirc or both. The reason you're probably not gonna find anybody around here with one is because it's an Australian product, and the fairly decent reputation of ebay knockoff BOV's, it's gonna be hard to convince anybody that $300 american after shipping beats $50 looks-like-a-Forge.

As far as fitment, they fit like any other valve on any other car. The picture clearly shows a weld-on bung and a 1" hose adapter, which is how about 95% of BOV's are attached.

cool. I just got one off of ebay.

eBay Motors: 2002 GFB Go Fast Bits Hybrid Blow Off Valve kit VW 1.8T (item 220386271413 end time Apr-11-09 14:16:50 PDT)

I have a GFB Stealth FX BOV which is somewhat similar to the one you purchased. It works well and I have no complaints other than it being a bit heavy. All that adjustability just adds weight. I have it adjusted for full recirculation and should have just got their basic unit that doesn't have the option of venting to air.

Sweet! They dont sell a flange for the miata so i just hook it up rubber hose style, right?

Yeah, my BOV is hooked up with 1" rubber hose to my BEGI throttle body inlet pipe (MSM specific part) and the recirculation path is also 1" hose to my AEM intake.

I find that I get the best performance if once or twice a year I lube the BOV piston with a little bit of oil.