I've never been pulled over in any of the peformance cars I've owned.
94 300zx TT pushing 358whp. Full exhaust. 1/2 inch off the group. Really dark tint.
03 wrx full 3 inch turboback exhaust, FMIC, and HKS BOV.
It usually takes something very minor; excelerating too quickly with loud exhaust, having a light out, not having your license plate on your front bumper, not coming to a complete stop, registration, etc. They will try to find some way to pull you over. I have not once been pulled over in my performance cars but I have been pulled over for doing 75 on the freeway, which is BS. I had my little brother in the front seat and he had his seat reclined because he was sleeping and I was in the carpool lane so he prob tried pulling me over for that.
But once you're modded. They might find any reason to pull you over.
Drive Safe