I did the SR4131 and SR4130 and did not like it. I have an 07 limited 2wd 4Runner. The springs have approximately 11 or 12 wraps and are stiff. They lifted my truck 2.25 inches in the front. Now I most likely had some settling with 175,000 miles on the stock setup but that was too high for me. I was only going for about an inch higher if any at all as I wasn't trying to lift it. I rebuilt the struts with used 4WD stock 4Runner springs and I am now an inch higher than I was with my original springs and they feel good. Rebuilding them was a pain because the KYB springs are too tall and tightly wrapped that doing the no spring compressor method didn't work. I had to use a spring compressor and had a hard time fitting the pieces between the coils to compress it. A sledge hammer and a crow bar helped but it was not fun. The factory 4WD springs went in easy.
