Car Radio Antenna Adapter Kit Chrysler, Dodge, Ford, and Jeep 2002 & Up (BAA20 21, 40-CR30) Chrysler antenna adapters,For adding CD FM modulator Adapter is 6 In. in length, Fits into factory plug Factory Radio with Flat Connector to Aftermarket Antenna Function and compatibility, Metra: 40-CR30 BestKits: BAA20,BAA21 Manufactured to the Highest Quality Available , Meets the standard of excellence.