he doesn't have to have one. it's called an auto timer not specificaly a turbo timer, although traditionally they are used for turbos. seems like a nice mod to me.
So then what the hell would be the point of this?
Well in turbo cars after a long hard drive the turbo and engine oil will be very hot, turning the cars off without cooling is bad for the turbo because hot oil will just sit and cook in the turbo. therefore you have a turbo timer which allows the car to stay on and run coolant to cool the oil.
Same applies to NA cars. after a long hard drive it is better and safer to allow the oil to cool before turning the car off. Although it usually isn't as necessary for NA as it is for Turbo. I didn't have one of these at button willow and ambient temps were over 100 degrees so i had to use my last laps as cool down runs.