NRG Bonnet Dampers are made for your original bonnet. These units allow the bonnet to remain up and stable even under high wind conditions and were thoroughly tested for repeated use. NRG offers dampers in full and low pressure depending on whether the vehicle is equipped with a heavy original bonnet or an aftermarket lightweight FRP/CF hood. If your bonnet is original order normal 'NRG' dampers. If your bonnet is lightweight CF/FRP then order 'NRG CF' dampers.