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For Ford 11-18 Factory Radio Add A Subwoofer Amp Plug and Play Harness RCA Cable | eBay
Stereo Radio Wire Harness Head Unit Video RCA Adapter Fit For Ford F150/F250 | eBay
Ford 2011-2018 Factory Radio Add A Subwoofer Amp Plug and Play Harness – MotoCARR
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Amazon.com: NuIth Car Audio Speaker Wire to RCA Line Output Converter, 2-Channel High to Low RCA Converter for Adding Amplifier Subwoofer to Stock Stereo : Electronics
Add Aftermarket Amplifier Amp Subwoofer Sub to Factory Radio System Interface Adapter Wire Harness Inline Converter Fits Select Chrysler, Dodge and Jeep Models 2007-2010 - Walmart.com
Metra TurboWires 70-5701 Ford Premium Sound power and 4 speakers wiring harness with RCA connectors
Amazon.com: NuIth Add an Amplifier Subwoofer Interface for Honda Civic Accord Acura 2008-2017 RCA 2-Channel Line Out Converter w/Remote Turn on Wiring to Factory Radio Stereo Update Sound System : Electronics
Kicker Line Out Converter (KISLOC) 2-Channel K-Series Speaker Wire to RCA Line Out Converter (LOC) - Walmart.com
PAC SOEM-4 Factory Integration Adapter Connect a new car stereo or amps to factory vehicle wiring with this universal 4-channel line output converter at Crutchfield