[Jadewombat]

Of all the aero. tricks I've tried so far, venting the fenders made the most difference I could feel right away. Took the car out on the highway the next day and it felt much more planted to the road than before. I used a punch and flare tool on mine to make the holes. The turbulent air of the spinning wheels causes the fenders to act like wings and give the car some 'lift' at speed. If you look at new(er) cars they have a fender liner to minimize this distance between the tires and the inside of the wheel well.



Made a cheapo. roof spoiler out of garden edging recently. Just couldn't bring myself to spend $200 on a little piece of carbon fiber strip. Seems to help, car scoots off the line a hair quicker, could be my imagination too as I'm not being very scientific here but it definitely doesn't feel likes it's creating any drag.