good job

Awesome! Thank you for updating it! :)

Update: Now the Car get in the 6th gear. Topspeed :221km/h

I found that there is a slight mistuning of parameters, as this car is reluctant to get into 6th gear. This is usually a sign that Max Speed is not set correctly.

Excerpt from Car Modding Guide :

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One important thing to be aware of, after changing car parameters you must determine max speed and then set it for your car. To do this, go straight flat out until your car doesn't go any faster. Notice the speed in bottom-left corner of the screen (in kilometers per hour). You don't have to be on road for this, in Car Editor going off track won't slow you down.

Important, be sure you have reached the highest gear on your gearbox. In some cases car may not go above 4th gear, i.e. if it's too heavy and engine is too weak.

Then hit End Test Drive, go to Parameters and update Max Speed (KMH) slider to the value you had. In our case it's 240 KM/h.
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Really cool!

thx :)

Amazing!