I bought the subs for my Shaker 500 system, ended up returning them. The way they're wired into the amps, they only use half the available power. You can barely hear them at all. They're definitely quality drivers, but you really need to use them with aftermarket amps to make it worth it. With the factory Shaker amps, they're a big downgrade over the stock subs.
Also, the bezels are pretty ugly and don't match the aesthetics of the '10+ interior, if that matters to you. If they sounded good with the stock amps, I probably could have overlooked that though.
2010 Mustang GT | 401a | Track Pack