Bushings and pins for Class 7 and Class 8 trucks play a key role in the suspension system, helping to reduce friction and wear between moving parts. Bushings act as cushions between metal components, absorbing shock and vibrations to ensure smooth operation and reduce strain on the suspension. Pins, on the other hand, serve as pivot points that connect various suspension parts, providing stability and flexibility. Designed for durability and longevity, these components are crucial for maintaining the performance and longevity of the truck's suspension system under heavy loads.