This is a Powerflex Black Series upper engine support bushing (large), a 95A durometer polyurethane replacement for the factory rubber engine mount insert. It reduces engine movement under load, improving throttle response feel and drivetrain precision while using Powerflex's location-specific hardness selection to keep noise, vibration, and harshness in check.

Fitment: MINI Cooper and Cooper S (R50, R52, R53, Gen 1), W10 and W11 engines.