i think most JDM suspensions comes with softer spring rate. most of them come standard with 6kg (13.2lbs) for the front and 4kg (8.8lbs) for the rear. the ride quality for the one i have the tanabe sustec pro ss has that spring rate. at first i thought that might now work... but when u set it at 1 in the front and 3 in the rear... then try launching.. it just goes. and on cornering... no screaching sound of the tires. the ride is still comfy like stock but performs like a mofo!