The CTSV Gen2 (V2) factory shock absorbers come with Magnetic sensors installed within. When Enthusiast upgrade to aftermarket shock absorbers, there needs to be very specific resistors installed to handle the wattage and load of the vehicle movement with different ride height that take place. The Magride deletes we have sourced and built in-house have worked to 100% perfection for the last 6 years. Never a burned out resistor or problem with sensor failure. We build our sensors, then verify on our bench test. The sensors come in single or pairs. These sensors are automatically on the CTSV suspension orders.