Installed the firestone helper air bag kit in the rear coil springs. This was the second time installing the kit in a Prius. First was a 2011. Total time 45 minutes. Found a shortcut that simplifies inserting the bag in the springs. By removing the one bolt at the end of the lower control arm the entire spring can be easily removed. This bolt is not one of the camber bolts so it doesn't change the suspension geometry by removing/installing the bolt. Important note!!! Mark the spring location before removal. I used some nail polish. Put it back exactly like it came out. 25psi when I'm towing my tiny camper keeps the car level and no more high beam flashes from oncoming traffic. 10 psi when not towing seems to be the most comfortable. Ymmv. Feel free to ask questions.
I don't think I am interested, but congratulation! Neat job, with good information re maintaining the spring location. Posted via the PriusChat mobile app.