I have them on my car and I like 'em. Considering the size of my motor, I can feel a difference. Headlights are brighter too. Just find the ground wires alread on the car and replace them. There is one on the battery, one on the block or head (don't remember which) on the driver's side and another on the passenger side. That's all I found, but the Spoon kit only has three wires for the Civic so I assumed that was all of 'em.