Muchmore Racing`s FLETA ZX V2 Case & Timing cap Aluminum screw has 5 various colors. Depending on the color of your car, you can choose the matching colors. Full aluminum material, over 65% weight loss compared to original screws. But most important thing is not the color, or lose weight but by applying this product, you can increase the performance of the motor. Using Aluminum screw sets, will decrease the impact of magnetism, giving higher KV value at the same motor timing.