I’m installing a VBox HD2 in a 991.2. Has anyone been successful in connecting the VBox to the OEM GPS antenna? If so, is there a way to retain use of the vehicle NAV?

Evan, you will get a good dose of this with my car, and I want the VBox antenna. We'll be doing this as a winter project. If you are at VIR you may want to check it out so we can plan this. My roof mount problem is compounded with the sunroof, which I use quite a bit (the sunroof slides out above the roof). And then we have the rollbar in the back. Removing the seats to get access is easy (4 bolts), working back there is a PITA.

Just trying to keep the instal as clean as possible, as long as long as it doesn’t limit performance of the VBox.

There was a reference in the 991.2 thread of an adapter using the OEM antenna for the Nav to operate and connect to the HD2. This was for a track only car and the person wanted, as you do, to have a tidy installation without one on the top of the dash close to the forward lowest edge of the windscreen.

Because the VBOX systems are solely dependent on GPS quality of signal and satellite count to work properly, this is critical.

VBOX doesn’t even recommend internal mounting of any of their antennas, but I have used them on roll bar downtubea under class and on top of the dash far forward without much trouble for a few years, at least since the HD2 came out.

Road America, Sebring and some other tracks are on the edge and problematic, though. So think this through carefully. Not sure you can run two GPS consumers simultaneously, but it is possible.

I’d like to have better reception on cloudy days and cleaner install for my .2RS as well.
Subscribed.

Not like we will use GPS of the Nav system if you can use Waze via Apple play.
Don’t have the car yet, but I assume.

Looking into a FAKRA extension with a pigtail for the HD2. Won’t happen soon because I’ll need to arrange for a car to test it in.