These bushes are direct replacement items for the standard upper rear shock absorber bushes. These can go soft with age.use and these uprated items will tighten up the top of the rear shocks by reducing movement caused by worn/soft bushes. These are the stiffer Black Series compound which are more suited to track/race use due to their increased stiffness.
They are a direct replacement for the standard bushes and are priced per pair, you will need one pair per car.
Please note that PFF60-31BLK - Rear Shock Bushes are not compatible with the KTR Clio 2 RS Coilover kit.