That's only if they are countervailing duties, but either way several products cross the boarder 6 or 7 times before final assembly, all tariff free,  so in the first 100 days, a $100 component would see it cost rise to $152, after that only $113. 

What do you think will happen to production for the first 100 days? 

If customers can't get new US made vehicles for 100 days, they will buy Foreign made.

Even when costs have gone up 13%, that still hands Foreign Made vehicles a significant cost advantage