i'm never buying any perrin parts. They are way over priced and don't make any improvements over stock really. I was one of the first customers to install the perrin springs and they are just a cosmetically enhancing part. They are practically stock springs but give a drop, not stiff at all. Also they stole my pictures that i posted of my car wth the springs and put them on their site without asking
I dont care about that but their products dont seem to offer much performance while whiteline does and are proven products that they back up.