Simplify speaker wire connections when adding an aftermarket amplifier to select Toyota vehicles with our Speaker Connection Harness. This 18-inch harness features plug-and-play connections which match both the original vehicles amplifier as well as speaker connections. Add amplifiers easily with no need to cut or modify the vehicle’s original wiring. Please Note: although this product can be used for any installations requiring 'plug-and-play' speaker wire connections, this product can be used with the AP4-TY11 AmpPRO module. This harness is for vehicles with factory amplified systems only. Vehicle Application Toyota 4Runner 2003-2008 Toyota Corolla 2005-2008 Toyota Prius 2004-2005 Toyota RAV4 2004-2005 Toyota Sequoia 2005-2007 Toyota Sienna 2004-2010 Toyota Tacoma 2005-2008 Toyota Tundra 2005-2006