Just to make sure i understand, if i run the 275/40/19 on the stock pp 19x9 front 19x9.5 rear, would the 275s be too big for the front to the point where i would get better performance just running the oem staggered?You can easily run the square tire size 275/40/19 all around.
You can also easily do the following
Factory 19x9.5 rears all around, use a 5 mm spacer upfront ( not issues there) and a 275/40/19 all around as well.