Hi all, im just after abit of advice, im considering purchasing some coilovers for my st170 but i am in two minds

What are the advantages? Will the car look and handle much different/ better?

I am worried because i had a fiesta previously lowered 60mm on just springs, and ever since the fiesta was lowered the car became loose and felt more old and dodgy if that makes sense, a few friends have also had the same problems with interior parts and one with wheel bearing problems

And finally could anyone reccomend a decent set and were i could purchase some

Thanks andrew