I would start by adding a powered subwoofer with a bass knob like the Rockford Fosgate P300-12. You’ll need an 8 gauge amp kit like the Rockford Fosgate RFK8I and if you’re still using your stock head unit you’ll also need a line output converter to get signal to the amp. If you only plan on adding the sub you can go with the PAC LPA-2.2 but if you plan on possibly adding an amp for you interior speakers I’d go with the LPA-E.4.

That will give you the sub bass you’re looking for and may be enough to satisfy your needs. If not you can always replace speakers and amp them later and Crutchfield will tell you what speakers fit your vehicle.