Guys, here's some info from their website:www.cosmoracing.com
Coilover Kit BMW E30 320/325/M3 e/es/i/is 84-92 MODELS STREET HEAVY DUTY
COSMO Racing Adjustable Coil over Kits were made for performance enthusiasts pursuing the ultimate handling. Designed for street and track use, your car will be in total control, even under hard cornering situations.
Customize the height as needed for different wheel sizes and weather conditions. Give your car a more aggressive look by eliminating that dreadful wheel gap!
Our coilover sleeves, damper hats, and spring seats are made from high quality billet T6061 aluminum to ensure safety, reliability, and durability. Don't put yourself and your car in jeopardy with low quality sleeves and rubber damper hats found in some other brands.
INSTALLATION DIFFICULTY: HARD
Professional installation is recommended for this product. All coilover kits come complete with necessary hardware, detailed step-by-step instructions, and access to our tech support.
Category Coilover Kit BMW
Item Number Coile308492H
Name E30 320/325/M3 e/es/i/is 84-92 MODELS STREET HEAVY DUTY
Price $175.00 US
Instruction Sheet Included
Available Colors Red
Spring rate are 6kg for front & 8G for back. (6kg/mm = 336lbs/in and 8kg/mm = 448lbs/in) Havey Duty setup. It can be lowered from 0-1.75"! Can NOT fit on 4WD and convertible models.