[basjoos]

Since most of my driving is in the 55 to 70mph range, a speed range below the drag wall of my stock vehicle (and WAY below that of my aeromodded vehicle), I haven't noticed any noticable increased tendency for the vehicle to overspeed on the downhills and to require more braking than before aeromodding. But if I were coasting down the hills at 100mph, I would notice a bigger difference, since that speed would be well within the drag wall of a stock Civic CX, whereas the drag would be just starting to make itself noticable on the Aerocivic. At that speed the Aerocivic would require more friction/engine braking, but the Civic CX would be increasingly air braked by the increasing vehicle drag.

Even on the hottest summer day, I've never had any problems with brake fade on the longest, steepest grade around here, a 1000 foot drop off the Blue Ridge escarpment, the steepest parts of which are a 3rd gear hill climb.