You can find this product under 2013-2015 Lexus GS350 GS460 GS450h F-Sport LED Fog Lights (70-608).
Credit goes to mso4 from ClubLexus for this very informative guide.
Step 1: Turn the steering wheel so you can get better access to the wheel wells. You'll need to remove two of the plastic clips and a few screws that are under the bumper.
Lift the fender lining out of the way.
Step 2: After you remove the fog lamp garnish bezel, reinstall the new iJDMTOY fog lamp the same way. You can help secure the assembly by taking one hand to push in the new fog lamp into the lower bumper and using your other hand to simultaneously pull it in from behind.
Step 3: Time to hook up the wires. To install the relay, the wire will need to go through the firewall and inside of the car.
Below is a walk through video to demonstrate how to connect the wires to power up your new fog lights.
Step 4: Mount the switch. A great place to mount the switch is around your center console, but you could also mount it in another convenient location that works for you.
Check to make sure everything works and enjoy your new Lexus GS LED fog lights or halogen replacement fog lights.