RACE ONLY. Rear trailing arm bearing for E36/ E46. Highest quality American bearing in a billet aluminum carrier. Bearing is separately mounted, so variations in trailing arm width do not affect reliability. Metal to metal rigidity makes us recommend this for race cars only. This bearing is bolted in, not pressed into place, so it will not loosen over time. All Ground Control products carry a lifetime guarantee against defects when installed and maintained correctly. We strongly recommend that all of our products be installed by a competent, qualified mechanic.