This is an alternator filter. It has two wires. I bought it from crutchfield.

Don LaReaux
2000 Contour SE
Nakamichi 40z HU
Kicker i570 (front)
Stock (rear)
2 10" JL subs
Memphis 16-ST500D (500rms)amp
Rockford 160.2 pushin the front Kickers