Measured the middle gap of the rear springs which came out to 1 3/8". According to SumoSprings calculator, I would need the SuperSprings CSS-1145. Ordered mine through Amazon (~$216 shipped) and it should be here by Friday.
Got my SuperSprings CSS-1145 in on Friday and finally got some time today to install them. There are no holes in the springs as well as no zipties to secure them. Installation was a breeze with some soapy water in a spray bottle. Overlap is just over 1.5" and I installed the bottom edge on the brown stripe on the coil.
Before installation measurements:
LF 25 3/4"
RF 26 1/4"
LR 26 1/4"
RR 26 1/2"
After installation measurements:
LF 25 7/8" +1/8"
RF 26 3/8" +1/8"
LR 27 3/8" +1 1/8"
RR 27 3/8" +7/8"
I just noticed something unexpected. It could be just my imagination but my average MPGs went up! Where I was normally around 35mpg I'm now up to around 37mpg on my current tank.
My first impression with the SumoSprings as that the ride is much firmer but not harsh. The car isn't porpoising over the wavy roads like it did before. I've driven over 100 miles so far and I don't notice anything else. After this tank, I'll hook up the single wheel trailer and see how much effect it has on the rear suspension.