This is for the GT1R secondary injector addition harness.  

There are 3 pieces to this loom.  

Piece 1 will attach to the ecu, with a nearby connector allowing easy ecu removal. 

Piece 2 attaches to the injectors and has a nearby connector, allowing easy intake manifold removal by simply disconnecting the single connector. 

Piece 3 goes in between these two connectors, as an extension loom from ecu to injector sub-loom. 

Email if you have any installation questions.