I purchased my X about 2.5 months ago. It was never driven except for on and off the truck and still wraped so it had the origional X factory flash on it.

Mine runs fine, no hesetation, idle problem and its pulls hard.

Any reason why i shoul dgo ahead and get the flash? pros/cons?

 

If it's not broken, don't fix it. If you feel that your X is running fine then it won't need the new flash. The flash is only applied to certain X's that are having those symptoms.