SuperPro employs several clever engineering techniques to manage the properties of its unique Polyurethane material to ensure it delivers the benefits of the more complex material without ruining ride comfort or introducing noise, vibration or harshness.

One of those techniques is Voiding. See the photo as a great example of it in action. This is SuperPro’s solution to the large rear bush on the front control arms on a Land Rover Discovery 3 & 4 and Range Rover Sport.

The original equipment bush is a ‘hydraulic’ bush filled with fluid to help take the sting out of sharp impacts. However, this design is highly prone to failure. The rubber outer casing goes hard and splits. Still, the frequency of specific impacts, particularly square-edged hits (such as kerbs), can cause the bush to rupture and leak all the hydraulic fluid – which is neither good for the environment nor the vehicle’s handling.

You can see how there are deep cutaway channels running along the outside of the bushes where they will contact the inside of the control arm housings. These are called ‘Voids’. These ‘voids’ are key in allowing the material the opportunity to flex and move in line with Land Rover’s original parameters without creating unwanted noise vibration and harshness. The materials’ resilience ensures that the suspension regains its alignment, and because it delivers this without the hydraulic features of the original, is less susceptible to damage and wear. In common with all SuperPro products, these bushes are supplied with a three-year/36,000-mile warranty regardless of how cold it gets.

Monday 20 March — Jon Nicholson

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