After I run like 60miles or more, I turn off the engine and I hear the fan sound from the front bonnet. I heard that since I first time bought my car.
It's kinda late to ask because I already ran 57k lol. Is this normal?

 

Other threads discuss the same thing... Yes, very normal.

 

Question related to this. after I install my ddm works Intake I dont hear the fan after I turn the car off anymore. Normal?

 

Depends on how hard you run the car. I very rarely hear mine during the cold winter months as it is down around 10-20 degrees here much of the time unless of course it run it real hard for 30+ miles then just shut it down and get out. Then I will hear it.

So I guess what i am saying is that it could be normal if the temps are down and the car was not run hard.

To check it run the car hard for 20-30 miles and then stop and check it.