Do I need a wheel alignment after upgrading wheels.. I had 17' SE wheels and now I have 18's.. Let me know, Thanks in advance.

 

Changing the size of your wheels does not (usually) change the camber/caster of your car, unless you messed with something in the process. The alignment is done to the parts that hold your wheels, not to the weels directly--so unless it was off before, you should be fine. If you notice a pull and you have already checked tire pressure in all tires, it would be good to have an alignment. If not, you should not have to worry.