To fit uprated injectors to your Subaru, you would generally need to cut the existing plugs from your wiring loom and reattach the plugs supplied with your injectors to enable them to fit on the loom.
Our Plug & Play kit eliminates the need for this process, allowing you to simply plug into your existing loom with these adapters, and then into your uprated injectors, for a completely OE-looking installation, without the headache of adapting the loom.