Focal P 20 FSE Flax Evo Series shallow-mount 8" 4-ohm component subwoofer at Crutchfield
SUNDOWN AUDIO SML12" 500W SHALLOW MOUNT SUBWOOFER
Focal P20FSE 8" Shallow Mount FLAX Evo Car Subwoofer 400W Slim Subwoofer BNIB | eBay
Amazon.com: MB Quart DS1-204 Discus Shallow Mount Subwoofer (Black) – 8 Inch Subwoofer, 400 Watt, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics