A performance enhancement system incorporating a controller, an engine tachometer and a visual indicator light which illuminates within a predetermined range of engine RPMs and which may be separately mounted as required in the driver's visual focal plane to reduce visual distractions, aiding the driver...http://www.google.es/patents/US7012514?utm_source=gb-gplus-sharePatente US7012514 - System for facilitating the launch of a drag racing vehicle
System for facilitating the launch of a drag racing vehicle
