Anyone know if 225/45/17 tires will fit an 07' EX Coupe?

I have 215/45/17 on it now.

 

The 225's are a dead fit on your car in 17's.
Have you got the right sized wheel as far as offset goes?

 

if you go to a 225, double check your tire diamater (the outside of the tire, not where the rim goes). A 225/45/17 might throw your speedo off. I think a 225/40/17 might work better. Double check with a good tire shop