Coilover pillow ball

If a driver is looking for a sport and racing feel of his ride then a sport or a street coilover is a better bargain.

This is because the ride height of the vehicle can be adjusted according to the driver's needs and satisfaction.

Street coilover has a hardened rubber upper mount designed to eliminate noise, extending the life of the top mount and increase ride quality.

Rubber mount

Track coilover on the other hand uses steel pillow ball upper mount that offers additional chamber angle for aggressive driver on track. By altering the chamber angle it increase stability and handling.

The pillow mount on track coilovers however can create slight amount of noise over road bumps. On the other hand, drivers cannot adjust the chamber angle of the rubber upper mount typed coilovers that are used only for comfort ride.

This answer the question why stock suspension is much comfortable than a tuned suspension with coilovers.