This is a kit for both O2 sensors.

Compatible models:
Kawasaki   ZX6R 2007 - 2008   (VIN Plate year code "7" )

later models use a different shape plug

This kit contains a pair (2) of O2 Oxygen Lambda Sensor Eliminators Fitted with Protective end caps.

and 2 Stainless Steel Exhaust port blanking plugs with copper sealing washers

Supplied with printed fitting instruction for O2 Sensor Eliminators

                                                                                           O2 Sensor Eliminators are a Simple Plug and Go Fitment, No Wire Cutting Needed

The O2 sensor located inside the exhaust is used to detect the emissions from the engine.
The O2 sensors are fitted to enable the ECU to weaken the fuel mixture to comply with the emission standards
and in certain throttle positions (mainly mid-range) will try to lean the mixture too much.
This is good for the emissions but not for the performance and smoothness of the engine.

With the elimination of the sensor:

Improve throttle response, with smoother power delivery and more torque available
Support Fuel Injection modifications like Power Commander or V&H Fuelpak
and other mods that require the elimination of the sensor.
Or you might simply want to disable a faulty o2 sensor.

Note: This items in this listing are not for use on a public highway or road, as it is illegal to interfere with the emissions system on a vehicle that is used on a public Highway. To Comply with ebay policies, this item is sold on the understanding that the buyer will only permit its use for off road, closed circuit, or track racing use, and it will not be used on a Public Highway