Using your Cobb Redline Fuse Cover is easy. First, refer to the included installation guide to properly install it on your 2008 - 2021 Subaru WRX or STI. Make sure all connections are secure during installation. As for maintenance, you can clean it with a soft, dry cloth to keep the high - quality gloss finish looking its best. Avoid using harsh chemicals as they might damage the carbon fiber or the finish. Remember, because the parts are hand - laid, there may be slight imperfections, but that's part of its unique charm. Don't worry if you notice some variances in the weave pattern; it just shows the craftsmanship of the product.