I have an 08 and bought these
Amazon.com: LUYED (2 Extremely Bright 1600 Lumens Backup Reverse Lights 360-Degree Shine 921 912 W 16W 3020 30-EX Chipsets, Xenon White, No Hyper Flash: Automotive
and replaced my existing backup lights, huge difference. In addition I also mounted a couple LED’s to my aftermarket HD tow bar.
If you’re dead set on modifying, you can just cut holes your existing bumper and insert some flush mounted style lights. Seems like it would be easier.
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My build thread https://www.toyota-4runner.org/4th-g...ml#post3520544
2008 Titanium Metallic 4WD 4Runner V6 SR5| Satoshi Grille mod|17x8 Level 8 MK6 wheels, 275/70/17" Falken Wildpeak tires| Front-Bilstein 5100's set at 0 with ToyTec branded Eibach silver springs and 1/2" ToyTec spacer driver side, 1/4" ToyTec spacer passenger|Front Diff. drop spacer kit|sway bar relocate kit| Rear-Fox 2.0Resi and ToyTec superflex black springs|Tyger Bull bar with LED's/Lund HX tube side steps
2021 Subaru Crosstrek Limited in Crystal White Pearl