Features two 4 ohm 3 1/2" coaxial two way speakers. Huge improvement over the factory single speaker and no modifications needed. This unit is for all 1967-73 cars with or without in-dash factory AC. In Non-A/C cars, this speaker may partially crush the vent duct tube.
Check out the "Cougar Dash Surgery, Clock and Speaker Install" video by Andrew Chenovick: