This genuine Honda DC5/EP3 underdash sub-harness provides plugs that are key ingredients for creating a plug n' play engine harness for a K20 engine swap into EF/EG/EK/DC2 vehicles.

It can also be a direct replacement under dash harness for 02-04 RSX and 02-05 Civic Si vehicles.

For the mentioned K-swap vehicles, it's mainly used for donor plugs and NOT to be used as an actual usable harness.