The touge runners engine bay dressup washer kit. Blue dressup washers These are made from 6065 billet aluminium. The bolts are a4 marine grade stainless steel, which have a higher tensile strength and better surface against corrosion making them superior to the other a2 washer bolts you see on the market. The dress up kit includes 10x billet aluminium washers 10x a4 grade stainless bolts