All Mk1 cars have one rear shock mount per side. Technically speaking, they "suck". That's because they allow a lot of wiggle which makes it hard to hold a consistent line around hard corners. This is only exaggerated when the inner rear tire comes off the ground and full weight is transferred to the other side. Instead of a progressive and smooth drift, the tail often ends up wagging the dog. -not fun but easily avoided with this product.
Sold in kits to complete one vehicle, these upper mounts deliver more control and feedback from the rear suspension. The parts are inexpensive and easy to install, so get your act together and have more fun behind the wheel.