Positive Steering Response System (PSRS)

The ALTA PSRS replaces the front control arm rear rubber bushing with high performance urethane, improving handling and stability. Acceleration gains better front traction with reduced wheel hop, while braking feel is sharper with less wandering and more predictable cornering.

OEM MINI bushings use soft rubber to reduce NVH, but this allows excess wheel movement under braking, acceleration, and cornering. The firmer PSRS design reduces suspension misalignment, delivering more consistent, predictable handling in everyday and aggressive driving.

The ALTA PSRS features an offset center pivot that allows up to 1.5 degrees of added caster for improved straight line stability and reduced highway wandering. It also minimizes the impact of rutted pavement, especially on wider wheels and tires. The added caster enhances handling with little to no increase in steering effort.

Replacing your OEM bushings before a complete failure is great preventative maintenance and a good way to improve your cars handing. The OEM bushings are constantly being twisted as your control arm moves up and down. Over time, the rubber hardens and begins to crack. The ALTA PSRS with its special urethane bushings will outlast the OEM bushings for years of performance driving.

Caster is the angle of the pivot line, an imaginary line that runs through the center of the upper ball joint and the center of the lower ball joint. In effect caster is the angle on which the steering knuckle rotates. MINI provides no factory adjustment of the caster angle. By offsetting the pivot point of the lower control arm, installers can now adjust the caster angle by rotating the PSRS prior to installation.