Idea about 206xr sport helesor spring

friends, I am thinking of buying a sports coil spring. I can provide brand or price information and what are your recommendations?

Vehicle Drop Rates In General
It is divided into 2. One of them is 3.5 cm
5 Cm Of Other Download Rate ...
If the rim ratio is 15, 3.5 cm is ideal.
5 Cm Reduces A Lot Of Comfort In The Car.
Price Average varies according to the quality of 100 TL 350 TL.
If you want, there are places I can recommend.

yes yes like that .. after i had the front set seriously the front of the vehicle got up ... in my researches most places said that 3.5 cm spring should be worn ... my wheels are 15 .... unfortunately the price is very salty man said 275 .. .... I do not understand much, the bow of the men who say that the bow is 3.5 cm ... the backs are already tortured ... I just learned this :)