Examples of Non Flowering Plants: The Complete List 33Science SuperPro Roll Centre Adjusting Ball Joint. SuperPro Roll Centre Adjusting Ball Joints will optimise your cars performance! Lifetime Warranty Reduces roll bump steer essential for lowered cars Reduced abrasion, temperature resistance and harshness Enhances your vehicles handling and performance Designed, engineered and manufactured in Australia A must for lowered vehicles, SuperPro roll center and bump steer correction kits are designed to correct roll centre geometry using specially engineered ball joints and tie rod ends. Raising the front roll centre results in a substantial increase to front roll resistance and a significant reduction in suspension compression of the outside front wheel during cornering. The result is more even weight distribution and improved tyre contact ultimately improving front end grip and cornering speeds. SuperPro is the leading aftermarket suspension manufacturer with 40+ years of experience. SuperPro has a competitive edge over all aftermarket bushing brands with our products being developed, tested and designed in Australia, ensuring greater quality during the manufacturing and engineering process with the ability to develop advanced bushing designs. SuperPro bushings offer greater quality and reliability through their unique materials, made from a proprietary polyurethane mix which has been thoroughly tested and refined over 40+ years to suit Australias harsh conditions. Our innovative bushings have been produced with the input of highly skilled suspension technicians and engineers, ensuring the best quality and evaluation in product development.