APR Ignition Coils are designed to be a direct plug-and-play upgrade to factory coils, and provide greater energy output, ensuring a stronger and more consistent spark. The commonplace replacement of factory ignition coils with those taken from higher output Audi RS models, such as the 2.5T, is popularly believed to provide greater energy output.  However, testing proves that they are no more powerful than the factory coils that are found on 1.8T and 2.0T engines. APR Ignition Coils increase energy output by 10%. They are a direct upgrade or replacement, and come with the coveted red housing (blue and grey housing also available) made popular by the Audi R8! Features: 10% more energy output than stock Red/Blue/Grey housing with APR Logo True upgrade, not just aesthetic Direct plug-and-play NOTE: Brisk spark plugs do NOT fit VW MK8. What's Included: APR Red Performance Ignition Coil Pack Performance Spark Plugs (OPTIONAL & SOLD PER COIL)