- Made to deliver second to none quality and absolute reliability - ONLY for aftermarket radio installations. - Fits the 24-pin Speaker/Power plug on the car side. - This harness does not fit the connector on the factory radio. When installing an aftermarket radio rely on plug in harnesses designed by industry experts for the best factory fit and finish. Best Kit Harnesses are made from the highest quality materials available. All harnesses use 18 gauge wire with E.I.A. standard colors. Connector housings are molded from precisely machined tools to provide a factory smooth connection.