ALP GPS Antenna's

[tawwwd]

So the receiver can be blocked by plastic dash pieces and still function well? My stock GPS is on the back roof part of the car, not in the dash. If I can conceal the ALP GPS inside the dash, I will do so.

itll work fine behind the dash

not sure how your car is exactly but the shark fin on the roof is usually for satellite radio etc...GPS reciever (at least in my vehicles) is behind the nav unit in the upper part of the dash.