The image above shows a Rear Window Roof Spoiler for a 2021-present Lexus IS. The shown curved roof spoiler design measures at 2 5/8″ wide & 1 1/4″ high. The rear window spoiler is also an UNPAINTED polyurethane rubber with a flat black finish.
Head over to Amazon to grab your own rear window roof spoiler for around $89.00 plus shipping.
Manufacturer Part Number: 763250588666