Whiteline W92994 Black Bushing Kit: Automotive. Buy Whiteline W92994 Black Bushing Kit: Vehicles - ✓ FREE DELIVERY possible on eligible purchases. Mount Front Bushing . The White line kit replaces the bushings in the rear sub frame to dramatically reduce rear cross member misalignment and movement which allows a more positive feel from the rear end during cornering. Recommended for motorsport applications. . . .