Accu-Tuned 12” Dual sealed subwoofer enclosure designed for optimum bass response and low frequency for the Dodge Ram Truck. OEM-Fit is designed and engineered specifically for the 2002-2018 Dodge Ram Quad Cab trucks to ensure an OEM fit with out impeding the operation of the back seat. 2.27 Cubic Feet Net Volume internal air space(.63 per sub) is ideal for tight accurate bass reproduction. Built from the Highest Grade MDF for Ultimate structural rigidity and no-flex construction.