Reply from tacotunes.com:
According to the manual Hertz Hi Energy HSK165 Component Speakers Manual Toyota FJ Cruiser you will need to spec a 5.8 inch coutout for the mid range driver & 1.614 cutout diamter for your tweeters. You can order the tweeters for your FJ Cruiser here @
Please be sure to put size above in the order notes.
Customer info removed by request.
Tetolon® soft dome tweeter.
25mm ø, ferrofluid-cooled mobile voice coil.
High energy Neodymium magnet.
Rear acoustic chamber.
Revolving support and accessories for factory location and flush mounting.
Very flexible, high current input cable.
Soft iron plates for high heat dissipation, part of the symmetrical magnetic flux motor.
Over-sized magnet; provides outstanding energy for maximum control.
Pure copper voice coil wound on a KSV former; for excellent thermal and mechanical
Vented bottom plate; improves linearity and thermal dissipation.
Damped Mesh Fibre Cone; for extended bandwidth and smooth response.
V-cone®; for the best off-axis dispersion and mid-high frequency detail.
Anti-vibration rubber magnet cover; damps spurious vibrations.
Aerodynamic die-cast aluminium basket; eliminating rear wave reflections.
Radial Venting System; for efficient thermal management.
Loss-less Polymer Rubber Surround; for long throw and maximum damping