They are H&R springs...shorter than normal H&R race springs...over Koni adjustable shocks. Put together by KW. They are just too stiff for driving to work in San Francisco. Used about 6 mos. May be willing to trade for H&R race springs and Bilstein shocks and cash. Paid $2200 for them and asking $1700/OBO. Also have my 18" rims for sale. During the week, please email me at [email protected] Thanks.