The Volvo Parts, Accessories &
Performance Specialists Since 1963

Why Polyurethane? (aka Poly)


We first began using polyurethane in our anti sway bar bushings about 20 years ago as it had many superior qualities over rubber sway bar bushings. There are many advantages to using poly for bushings:

  • polyurethane can be made quite a bit firmer than rubber
  • polyurethane has a high resistance to oil contamination and doesn't deteriorate quickly like rubber does when it comes in contact with oil.

Over the years we have developed ipd Polyurethane engine mounts, transmission mounts and suspension bushings help control drive train flex exaggerated by tired rubber mounts. Ipd polyurethane engine mounts, transmission mounts and suspension bushings also reduce chatter, missed shifts or harsh shifting and improve overall throttle response. In extreme cases, worn rubber bushings can allow enough movement in the power train or suspension to cause serious damage to other critical and expensive parts and worn suspension bushings can lead to serious alignment and handling issues.

Polyurethane is an ideal material for performance suspension bushings, engine and transmission mounts. Rubber mounts and suspension bushings are still commonly used by vehicle manufacturers as they do provide a good compromise between comfort and durability, but in many applications, especially where performance is concerned polyurethane is a superior choice that improves performance as well as longevity.

Increased horsepower, larger wheel and tire packages, stiffer performance shocks and lowered suspension mixed with grit and grime push rubber bushings beyond design limits. Polyurethane bushings are firm enough to control movement and maintain alignment in sway bars, control arms, and other stressed suspension and engine components with much less harshness or resonance associated with solid metal or nylon bushings.