I recently ordered a set of black aluminum valves for my Tires & Wheels from Circuit Performance and I am extremely satisfied with the quality of the product .Thanks to my knowledge gained in practice I know how important valve stems are and these have definitely exceeded my expectations. The black color of the valves adds an additional touch of style to my car and I have received a lot of compliments. The only con is that installation can be a bit tricky if you are not experienced with this type of product. Overall, I highly recommend Circuit Performance`s black aluminum valves for any Automotive enthusiast looking TO upgrade their Tires & Wheels..