This 2007 Honda Civic SI features a simple space-saving system. A Crossfire P1 12" subwoofer rests in a fiberglass enclosure that is flush-mounted into the driver's side trunk corner. The customer's existing amplifier received a custom mount and was installed opposite the subwoofer. Both the subwoofer enclosure and amplifier mount were wrapped in trunk liner for a factory look. Additionally, a Motorola IHF1000 Bluetooth hands-free kit was integrated into the audio system.