I don't have the extended heater. Just two vents pointing towards windshield and two down by the floor. The heated seat elements were easy to install, just time consuming. There is a million staples holding the seat covers on. You need a decent electric stapler to put the cover back on. I only put them on the seat bottoms not the backs
The heating elements I bought have a high and a low setting and work well. There's a connector so I can unplug them to remove the seat base. I've had them in over two years and they still work even after pressure washing the machine multiple times.
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