Welcome to GTA5-Mods.com

Hmm.. Where to start?
First of all, the poly count is way too high and many polys in one position (as a modeler yourself, you would hopefully know that its just too much.)
Secondly, car texture is bad, and it seems like you only use unlocked material from lcpdfr.com. The lightbar is bad (by bad, I mean details are bad, and the glass too)
Some things are also misplaced, for example the main leds on the lightbar (if they are turned on)
Last, but not least, there are also some spelling mistakes in the readme.