Noop, most of your in-town (i.e. local cops) police Chargers have the 3.5 V6. Your highway patrol Chargers have the 5.7, and they aren't "chipped", they're the exact same 5.7 that anyone can get in an R/T model (unless you were referring to some other sort of "chip", as in California Highway Patrol...).

Easiest way to tell the V6s from the Hemis are the V6 has a single exhaust while the Hemi has duals.