I checked directly with Thule and you are correct that they do NOT currently show any confirmed roof rack fits for your 2016 Lexus IS 350 sedan.
Available roof rack options from Rhino-Rack, Yakima and Inno that we offer are shown on the linked page. These include several options for your sedan that has no roof hardware (no rails or crossbars) such as basic round and square bar racks as well as the quieter aero-style bars such as those in the Rhino-Rack Vortex system made of parts # RRVA118B-2,... view full answer...
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