These Carrera QA1 Stocker Stars are a great alternative to Koni shocks without the expense of our Penske shocks. These are direct bolt-in aluminum shocks that are externally adjustable. With a simple turn of the knob, these direct bolt-in aluminum shocks can be externally adjusted for rebound and compression through twelve different settings. Includes heavy-duty nylon upper bushings and lower mounting brackets. A completely rebuildable single adjustable shock at a very attractive price.