RED DOT Competition Type Rear Suspension Silentbloc Suspension Bushes - RED DOT competition rubber suspension bushes are made in the UK for Alfa Stop by a long established rubber technology company. Made from a specifically formulated rubber compound to achieve a 91 IRHD (Shore hardness). The steel tubing is high quality seamless tubing specially imported from Germany for these items. These bushes are about as stiff as a rubber bush can be, and customers have reported a considerable improvement in axle location without serious reduction in ride quality. Destructive tests carried out in the manufacturer's laboratory have shown that the rubber bush tears before the rubber to metal bonding shows any sign of failure. Why are they called RED DOT? The red dot is to distinguish that these are not standard bushes. AlfaStop does not stock or claim to offer products manufactured by Silentbloc UK Ltd or any other associated company.