Uprated Engine Mounts - Cusco - GT86 & BRZCusco Uprated Engine Mounts for GT86 & BRZ Using a hard rubber design to limit engine movement. Fensport Tip: Cusco engine mounts uses harder shore rubber to provide improved engine location and to to improve vehicle handling and response. Note: Ride comfort will deteriorate. Engine vibration will likely to be transferred into the vehicle by installing harder mounts. May cause certain noise and vibration from the engine and transmission.