The ABD High Energy CDI Ignition System for the QV Countach is a direct bolt on - plug in installation product with RPM limiter. Utilizing today's technology for easier starts hot or cold, spark plugs stay cleaner and increase power.  You will feel the difference.  A direct replacement for the Magneti Marelli ignition box and coil. The ABD Ignition Coil Package was engineered and developed for 91-95 Diablos which are known to have coil problems.  These special wound coils and power amplifiers have been tested and installed in many Diablos over the last 8 years and not one failure.  These will increase spark, add horsepower, and are guaranteed for life.