This kit consists of four pieces of ‘Hardura’, a strong black PVC with a dense felt backing, which has to be glued felt side onto the underside of the bonnet with the high temperature glue supplied in the kit. The pieces are shaped to fit the recesses between the modified cross bracing that was introduced to the bonnet with the MKIII models and which was continued for the duration of Mini production. This will help reduce vibration through the bonnet.