I read their information & even with these high performance ball joints the "corrected geometry" still produces .999" 0f t/o @ 3" compression & 1.97" t/o in 3" droop.
I don't see how a car can steer correctly with that much bump steer, unless you are always on glass smooth roads. I can't believe any quality manufacturer would build over 3" of bump steer into a high performance car.
Seems to me the car would be darting every which way on a non-perfect road & when backing of at high speed the car would be very uncomfortable.
J.M.O.
Craig