Features:
-Breakable Glass
-Working Dials
-Dials are red
-Analog Dials
-Digital Dials
-Vibrating Exhaust
-Hands on Steeringwheel
-Fully Working Lights
-All textures has bump map
-Correct Door Opening
-Correct Tinting
-Has Own Handling
-Front Plate as Extra
-All the Basic Game Functions
-Models From Forza Motorsport 4
-High Quality Model
-HQ Mirror Reflection
-HQ Custom Dirt
-Dirt Mapping Body and Wheels
-Alpha Lightning System
-Dials Are At Real Positions
-Correct Passenger and Player Position
-Has All Collisions
-Correct exhaust smoke position
-Correct neon lights position
-Real Name
-Added Wheel's Fitted Perfectly
-Forza Motorsport 4 Model
-Converting By Me

Bugs:
-Mention in comment when you find any.

Enjoy !

Installation Guide:

Add-On:
Mods/update/x64/dlcpacks/ put the 911sc folder in it and then mods /update/update.rpf/common/data/dlclist.meta open it and add new line with name 911sc and save it and its done.

Spawn Name: 911SC

Replace:
Comet2 but don't forget to change vehicles.meta handling.meta values which is provided in the archive dont replace them just open them and copy the related parts then replace in your original metas.