Generic brand. Don't know the spring rate. Slightly stiffer than stock. Stock (used) spring perches come with purchase if you want them. Used for 4 years on my 86 eta and 1 year on a 91 325i with absolutely no problems.
$75

And this was how they rode on the i

Thanks for looking :D
$75

And this was how they rode on the i

Thanks for looking :D