yian

hi all, i'm thinking of changing the 13'' windshield i have on my '00 RSV with a larger one (probably the 17'' tall) to protect more effectively the passenger from the air he gets on his face when driving at speeds over 100km/h. Will that extra 4-5'' make any significant difference to the air flow at the back seat? Any personal experiences ? p.s. I hope i am not offtopic, greetings!