You’re seriously asking someone who’s job it is to find illegal modifications if it’s okay to illegally modify your car? Wow
As a smog inspector and repair technician in California I fail a fair amount of cars for illegally modified parts being installed. The most common being “cold air” intakes, obviously. Most people’s solution is to just to slap the old one in so I’ll pass it then take it out.
But, be warned: the CHP will absolutely cite your for illegally modifying your car, and if you’re a dick about it there are officers that are more than happy to cite you in a way that will cost you thousands of dollars.
It’s always some kid too. Poor kids.