A lot of GM products had something like that, so I don't think it would be illegal. Although, the placement is different. But then again, HIDs are technically illegal if not oem, but many people have them.
Avant Garde M310 18x8.5 Satin Silver. Engine Cover w/ Sonic Blue Accents. Sonic Blue Door Grabs. KW V1 Coilovers. OEM Titanium Headlights. OEM Replica Spoiler. K&N Air Filter.