Smoke Killer

LSPDFR introduced support for the new POLICE5 and POLGAUNTLET vehicles in the latest build 8757.
In build 8943, LSPDFR added support for 5 more police vehicles.
 
For most users, you'll appreciate the addition of two new police vehicles that were added to GTA in v3095. LSPDFR has made efforts to incorporate these vehicles into default backup, as well as working around Rockstar limitations which do not allow online vehicles to be used in single player.
This post aims to answer questions around the new vehicles, particularly for users using modified vehicles.
 
Since patch v3095, Rockstar has added the POLICE5 and POLGAUNTLET vehicles. We do not recommend replacing these vehicles going forward, for a few reasons:
The game will constantly attempt to remove these vehicles. LSPDFR patches this out, but you will not be able to use POLICE5/POLGAUNTLET, even if replaced, unless you are using LSPDFR or another modification that removes these restrictions. Unless the vehicles are correctly replaced, they will still have modkits and potentially undesired meta information applied to them. Liveries may not apply correctly. LSPDFR is designed for unmodified, vanilla games and only uses assets which ship in the game by default - so we assume these vehicles aren't modified and to change this you'll have to adjust agency.xml otherwise.  
This however doesn't change the fact that some DLC packs used POLICE5, so please see the FAQs below.
 
Here's a small FAQ:
 
So what's changed?
 
What if I don't want to see these new vehicles? I haven't modified POLICE5, I just don't like them!
 
I've replaced POLICE5 [or another MP vehicle], but LSPDFR is applying weird stock liveries to them! I don't want that!
 
I'm using another mod that changes LSPDFR backup behaviour, how does this affect me?
 
I did all this! My POLICE5/[or another MP police vehicle] replacement still isn't working right!
 

Are you referring to something like this? 
fbi (unmarked Bravado Buffalo 1st Gen)
fbi2 (unmarked Declasse Granger)
police (LSPD Vapid Stanier 2nd Gen)
police2 (LSPD Bravado Buffalo 1st Gen)
police3 (LSPD Vapid Interceptor)
police4 (unmarked Vapid Stanier 2nd Gen)
policeb (LSPD police bike)
policet (LSPD police transport)
policeold1 (North Yankton Declasse Rancher)
policeold2 (North Yankton Albany Esperanto)
pranger (Park Ranger Declasse Granger)
riot (LSPD/NOoSE Riot)
sheriff (LSSD Vapid Stanier 2nd Gen)
sheriff2 (LSSD Declasse Granger)
(Credits go to Police car mods: the whys and hows, and troubleshooting)