rear facing scoops and spacing bonnets up are a pain in the butt. i have tried both with my bb chev in the gq. all they do is push hot air up the screen and you will feel it coming through the cowl panel into the cab unless you run recycle air in the dash setting 100% of the time. when you hit water it will steam up and fog the windscreen as it flows out the rear of the bonnet. i ended up fitting all the factory inner rubber fillers under the guards and 2 gu bonnet scoops to run the air down the side of the eng and under the truck how nissan intended.before i fitted them the bonnet would be dry in a light shower and you couldnt put your hand on the bonnet if you had driven it. even the floor near the clutch was hot inside before fitting the scoops. after fitting the scoops it was awesome, even dropped the eng temp. the eng bays are designed to flow around a straight 6, bang a v8in there and you restrict flow massively. i guessed the position towards the rear of the bonnet to push the air down and hopefully help to draw the air through from the front.