These are poly, 85A in shore hardness, and are a huge upgrade over the stock swiss cheese rubber mounts. Stage I offers a higher level of performance over our Stage .5. These mounts still offer a good ride quality, with some increased vibration over OEM. Upgraded harware is included with all motor mounts. Included in the complete kit is a Stage 1 polyurethane transmission mount. This kit contains everything you need to replace and upgrade ALL of the motor mounts in your MKIII/ VR6 Corrado. *FITS ALL MKIII 2.0, VR6, VR6 Corrado