Principia Tuning

Fully customizable car with the following parts:

-Engine (customizable)
-Improved 5-speed transmission (customizable)
-Bodykits
-Spoiler
-Turbo with Blow-off valve (customizable)
-Nitro (customizable)
-Brakes (customizable)
-Horn

Tuning garage is behind you,
You can customize your car there.

Notes:
-You see the PT sign?
if you enter the garage it will become DONE sign.
you can leave from garage by tapping it.

-Nitro is not installed initially,
you just need to upgrade nitro.

-Blowoff sound may be unusual
but I tried to make this least unusual :)

Revision #2
-Fixed infinite nitro bug when nitro level is less than 5.
-Engine level now affects acceleration.
Revision #4
-Allowed derivatives

THANK YOU FOR ALL YOUR LIKES AND COMMENTS !!!