i was wondering if any1 has any experience with "sprangz" springs

they are over 100$ less then eibach pro kit, and claim to achieve the exact same thing

mustangtuning.com which i trust fully also carries them?

im confused

 

wooopps wrong section

my bad

 

****...for my cars ride, i rather spend the extra hundred and be safe...i hear the roush spring are one of the best, i think they go for $60 a piece..