Sold Individually. This is the Teflon sealing washer that goes directly under your injector. It acts as a buffer from the heat of combustion and seals the injector to the head.
There is one of these insulators under each injector. Typically, unless something below this washer is leaking, this is as far down as you will want to go. If you remove the pre-chambers below this insulator then you will also need to replace those copper sealing washers.
What is the other stuff under your injector? Click Here
