APR ignition coils are designed to be a direct plug-and-play upgrade from factory coils and provide greater power output, ensuring a stronger, more consistent spark. The common replacement of factory ignition coils with those from the higher output Audi R8 is generally considered to provide greater power output. However, tests prove they are no more powerful than the factory coils found on other motors. APR ignition coils increase power output up to 10% over stock. They are a direct upgrade or replacement and come with a unique red case ! Features: Up to 10% more power output than stock Red housing with APR logo Genuine upgrade, not just aesthetics Direct plug-and-play