this is just an optional texture for titanium texture on exhaust.
if you instal this, all car will have same texture as the requiem zr

simply replace the original texture in the vehshare

x64w.rpf\dlcpacks\mpbeach\dlc.rpf\x64\levels\gta5\vehicles\mpbeachvehicles.rpf

and/or

x64e.rpf\levels\gta5\vehicles.rpf