Using these Subaru OEM gasket and seal kits is easy. When you're doing engine work, just pick out the gaskets or seals you need from the kit. Make sure to double - check that the part you're using matches your engine model. As for installation, it's best to have it done by a certified Subaru dealership to keep your warranty valid. If you're doing it yourself, be careful and follow all the instructions. For maintenance, store the unused gaskets and seals in a cool, dry place. Keep them away from direct sunlight and extreme temperatures. This will help them last longer and stay in good condition for future engine jobs.