I've already bought the 90/10's and soon as i get the manual rack in they go in too, keeping the 4cyl springs in til i get coilovers. But i really dont know much about them. Which is more popular and which is better for what application. A coupe buddies have 90/10's so i assumed they were the most radical do the most for my car as long as it doesnt bounce real hard between shifts, i rushed into getting them and now im asking if i bought the right stuff, somebody slap me