RWA2258 Pinto/Mustang II strut rod bushings are made of urethane and are a direct replacement for the stock rubber bushings. While new rubber may be good at absorbing and redirecting vibrations, it doesn't last long. Our polyurethane bushings are more durable than the stock rubber ones and will outperform and outlast the stock units. We use these in all of our street and race Pintos. The few Mustang II's we have had over the years have had these installed on them.