This TVS diode is required with the use of any solenoids like nitrous, fuel, linelock or trans brakes when installing the Lingenfelter Launch controllers on your vehicle to prevent fly-back voltage levels at times seen in excess of 600 volts. Three TVS diodes are included with the LNC-2000, & LNC-003 Launch controllers. If you have multiple solinoids you will need to buy one for each solinoid.
These voltage levels have the potential to damage sensitive electronics including the LPE launch controllers, the PCM/ECM and other modules in the vehicle. To prevent damage LPE has developed a transient voltage suppression or TVS diode kit for use with any type of solenoid.