The mass air conversion harness is a simple and economical way to convert 1986 through 1988 speed density Mustangs to mass air. Combine with one of our mass air meters, and a mass air computer for a complete conversion package. Comes with enough wire to install the mass air meter out into the fender well for cold air applications. Wires have the correct ECM terminals pre-installed. Protective wire loom, and easy to follow instructions are included.