The rear uprights have a slightly different role than the front uprights but the impacts significant.
- Rear roll center moves roughly 1:1 with ride height. That means as you lower the car the roll couple stays constant. Adjusting the geometry brings the roll center back up reducing the roll couple.
- This has a major effect on turn-in. To the point you will have to recalibrate your timing.
- Camber gain gets steeper and steeper the more you lower. The effect this has on handling is felt when the back lets loose. A lowered Evo ends up having far to much.
- The correction brings back closer to OEM camber gain and is felt by a much more progressive back if/when the car slides. Instead of steering to catch the car, usually all we need is to hold throttle and steer where we want to go.
- Bumpsteer range is neutral in the middle. But if for example you hill climb and want a little toe-in on droop for entry stability or autocross and want the opposite, it can be adjusted here.
- Anti-Squat is also adjusted preventing outside rear squat under acceleration lifting and unloading the inside front.
All uprights are anodized black and sold as a pair.