Civil engineer Scott Dawson was willing to go as far as installing a home A/C unit atop his car’s roof, rather than pay $1200 to fix his factory unit. First image in gallery.
He just cut a whole in his roof and strapped it down and ran some duct work to blow air right on his head. Besides the bolts and brackets, a pair of bungee cords also helps secure the unit, which probably doesn’t do much for aerodynamics likely limits carwash options, but looks powerful enough to routinely handle triple digit temps. It’s crude, but likely very effective