I installed the TRD anti-sway bar and it
definitely tightened up the handling and it corners nice and flat. The rear end now tracks perfectly with the front. If you like to take corners any higher than the 'recommended' speed, this is a worthwhile mod! Pure bolt on, no drilling.

The longest part of the whole process was figuring out where to safely jack up the rear end, and where to place the jack stands.

After that, it was loosening up the lower shock mounts, slide the bar over the extended lower shock bolts, insert one additional bolt per side and tighten everything up with a torque wrench. Torque specs included in the install sheet.
The anti-sway bar tucks way up and under the car, virtually nothing hanging down except at the very end near the lower shock mounting location.
Bar before installing:
Bar after installation: