if you have a 4Runner, you know the exhaust fumes issue im talking about...... the one where if you roll the back window down while driving you get all those nice sweet rich smelling fumes of exhaust coming in the cab as the back draft comes in........

has anyone here figured out a way to prevent that from happening? i noticed its not such a huge issue with the later 4Runners and on...... the only thing i can figure out that they did was add the rear defuser on the top rear section of the gate to (from what i can gather) deflect wind down towards the window preventing that low pressure area of wind while driving to suck in the fumes......  

i think i may pick one up from the local yard and give it a try and see what happens....... ill keep you guys posted.