Using this product our team found that our vehicle's PERFORMANCE improved significantly in terms of handling and durability. The Circuit Performance Gold Aluminum Valve is the perfect addition to any automotive tire and wheel set, giving it a sleek and stylish look while also providing a durable, long-lasting performance boost. The lightweight build is a definite plus for those looking to keep down the weight of their car and improve efficiency .The only con we could find is that it may seem a bit pricier than other options on the market, but the benefits outweigh the cost in the long run. Overall, highly recommended!