Hello,
The back height of the car suits me but the front is too high. I looked at swift sport springs but they are sold by 4, I can't buy only the front. My ISF has 108000 miles and the front shock absorber assy were replaced at 95000 miles.
I found this topic on the US Lexus forum (photos pages 5, 6, 7) :
https://www.clublexus.com/forums/is-f-2008-2014/613660-isf-front-lowering-kit.html
It is about this product :
http://vipautosalon.com/store/index.php/super-now-isf-front-lowering-kit
What do you think about this kit?
My opinion : Very easy to install but for bolts and spacers, the price is not cheap (same for the shipping cost : 172 $...)