The piston pin bushing is a precisely machined bearing surface inside the small end of the connecting rod where the wrist (piston) pin rotates. This interface must have minimal clearance and excellent lubrication. Excessive wear here causes a distinct knocking noise and can lead to pin seizure or rod failure. We supply precision piston pin bushings made from durable, low-friction materials. Our bushings ensure a perfect fit with minimal play, allowing for smooth articulation between the piston and connecting rod, which is vital for quiet operation and long engine life.