I found this and popped it open to have a look and strike me down spring rate was the same as what Troy ( here are ur spring rates Troy shame u sold ur MPS ) and i talked about! Im sure the coilovers are not made to the highest quailty. Rear spring rates will make the ride a bit hard! swat and understeer will be less still i was suprised to see this
C8SPORT SSD COILOVER 04-10 MAZDA 3 SUSPENSION PRO BLUE: eBay Motors (item 190468238825 end time Dec-13-10 19:54:00 PST)