The MTX Thunderform custom subwoofer boxes are a great addition to any car. These boxes will give you the extra boost of bass you’re looking for while taking up only wasted space in your vehicle. We also stock custom designed car subwoofer enclosures that will fit into a huge range of vehicles. These boxes are constructed from high quality MDF wood and have a black carpet finish. Our MDF custom enclosures are extremely high quality and can be dropped into a almost any popular vehicle, they also have a price that is unbeatable.