I bought these sport springs along with Bilstein sport dampers for my Mazda MX-5. The old dampers were worn out which gave me an excuse for the upgrade. After changing out the springs / dampers I can really tell a difference. Right height lowered ~1" giving a little sportier look without being too low. Handling is also GREAT; the car stays totally planted in tight turns. Definitely one of the best upgrades I've done to date.
New struts are easier to replace
The KYB struts with springs are easier to install and make a big difference on the handling of the car.I did not have to worry about renting a spring compressor tool. The front struts installation was easier than the rear struts. Good price for the new parts and if you can do it yourself you will save a lot of money.