I think they use the same rates on both as std. My mate had the std gas kit on his 4x4 and were really good on that with the std kit springs. Mine feels too bumpy at speed. Even where I've had to back right off the throttle when having a tear up with a mate in his escos and he stayed flat out. 4th gear and a few humps in the road and the back end started to come round on me. I shit myself