The GKTech F8X M2/M3/M4, G8X M3/M4 Front Tension Rod spherical bearing replacements are designed to replace the factory OEM rubber bushings. OEM rubber busheings are designed to absorb road noise but that comes at the cost of performance. It's common for upgrades to be made of a harder rubber or a polyurethane but rather than a polyurethane or rubber bushings we have chosen to use a spherical bearing to significanty reduce bushing deflection and ensure a much smoother operation throughout the range of suspension travel. We have chosen to use a common (COM16T) spherical bearing which is PTFE lined and self lubricating for increased longevity. Simply press out the OEM bush and press the replacement unit in it's place. - CNC Machined 6061-T6 Aluminium Body - Common sized spherical bearing - Easily rebuildable Sold as a pair Vehicle Compatibility: - BMW F80 M3 / M3 Competition - BMW F82 / F83 M4 / M4 Competition - BMW F87 M2 / M2 Competition - BMW G80 M3 / M3 Competition - BMW G82 M4 / M4 Competition