This kit is to allow you to add heated lower glass to vehicles not originally equipped. The kit comes with both pieces of glass, as well as the required adapter harness. Boost Auto Parts offers a full range of replacement tow mirror lower glass compatible with all OEM and aftermarket Ford F150 and Super Duty mirrors. These fit OEM 2015-2020 F150 mirrors, and OEM 2017-2020 F250/F350 Superduty mirrors.
This glass has the backing which will snap onto OEM and aftermarket mirrors. The glass is equipped with defrost.
Cross References to Ford OEM numbers: FL3Z-17K707-J & FL3Z-17K707-K & FL3Z-17K707-U & FL3Z-17K707-V
Link to installation video: https://youtu.be/Ef7eakuNOSs
Fitment: 2015 2016 2017 2018 2019 F-150 and 2017 2018 2019 F-250 F-350 Superduty (including Powerstroke)
Haven't needed to use the heated upper and lower glass yet but I am confident that they will work if not I'll come back and post a revised review
Defrost on top and bottom is a great option. Mine appears to be working perfectly so far.
Haven't tested out the function yet, however I'm sure it will come in handy if you see any cold weather mornings.
Great option to have!