“Rubber” is used to describe factory bushing material and “polyurethane” is used to describe Hyper-Flex, the proprietary material used by Energy Suspension in its polyurethane products.

The rubber A-arm bushings in the front suspension last longer because t. The fastest wearing rear suspension part on 1963-’82 Corvettes is the strut rod bushing.

Polyurethane bushings last far longer than rubber because they're resistant to heat, ozone and harsh chemicals. If you keep polyurethane parts lubricated, and you will rarely have to do this, they ...