[Vehicles]Need for Speed Rivals Police Car Pack (Los Santos Police Department Livery/Redview County Police Department Livery)
Need for Speed Rivals has a lot of excellent police cars (Redview County Police Department) and they (all variants) could be an excellent edition to GTA V especially LSPDFR.
We have cars from Seacrest County (NFS Hot Pursuit) which are excellent so rivals could be given a chance especially its hypercars like the Bugatti Veyron Supersport, Hennessey Venom GT, Ferrari 458 Italia. The fact that there are Patrol, Undercover (my personal favourite) and Enforcer variants means the fun will never end.
Link to the Redivew County Police Department Cars are here: https://nfs.fandom.com/wiki/Redview_County_Police_Department
Ryan F has made one such mod via the Dodge Viper Pursuit [Replace] [ELS] (https://www.gta5-mods.com/vehicles/els-dodge-viper-pursuit).
To make them a part of the game, perhaps these cars could come with the LSPD livery and the RCPD livery - you can choose between driving them as a member of the Los Santos Police Department chasing street racers or as a fan enjoying the RCPD cars while driving them in San Andreas.