Rear Suspension Silentbloc Bushes - Bonded rubber suspension bushes are hand made in the UK for AlfaStop from a specifically formulated rubber compound to achieve a 75 IRHD (Shore hardness). The steel tubing is high quality seamless tubing specially imported from Germany for these items. The bushes are about 15% stiffer than the original parts yet do not compromise 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. The silentbloc is one of many product descriptions or types names which came into everyday use despite being the brand name of the original manufacturer. AlfaStop does not stock or claim to offer products manufactured by Silentbloc UK Ltd or any other associated company.