Killeen,

I have a Doran system. I do need the antenna extension. I have had my share of issues with it. I have Equal in my tires and do not have the correct valve stems, the ones with screens in them. So I ended up removing all the sensors from the bus tires due to constant false alarms. When I get new tires in the near future I wil get the correct valve stems or use Centramatic balancers. The sensors do work on my tow car just fine.