How are these terms applicable to large upgrade units (Whiteline, Perrin, & GT Spec)?
These kits, to varying degrees, decrease your car’s natural anti-lift and anti-dive characteristics. This will soften the front suspension during acceleration and braking and a softer suspension will even out the load on the front tires, giving a higher total total cornering load available or more front end grip. Another way of looking at this is that under acceleration or braking, the effective spring stiffness is lower, reducing the front end anti-roll resistance, hence reducing weight transfer at the front and less understeer.
