Pfadt Differential Bushings hold the differential in place by replacing the soft factory rubber bushings. The kit will help protect the differential and is an absolute must for handling the added power of a super charger or high horsepower motor. Made in the USA our bushing and sleeve kit provides superior quality and durability. The sleeves are made from 6061 T6 aircraft aluminum and anodized orange. An important upgrade for dialing-out wheel hop, this kit is a great addition to any performance Camaro. The installation is involved, but the results are well worth the effort. This kit includes bushings designed for performance street use. While these bushings are much stiffer then the factory bushings they still allow enough vibration absorption that differential noise is kept to a minimum.