Use to add aftermarket speakers to factory front door location. Slight modification of the speaker adapter is required for some speakers- that's normal and that's why these fit so many different sizes. For front door speakers only. Made specifically for most 6", 6.5", and 6.75" speakers. Speeds up installation time. Made from high grade plastic for a long lasting secure fit and corrosion resistance. Includes 2 plates and 2 speaker harnesses. Compatible vehicles: Made for 2005 2006 2007 2008 2009 2010 2011 2012 2013 Chevrolet Corvette