Edit Air dam is back on. I added some alumapanel to the center of the front bumper, it should have less than half the previous deflection.
Unfortunately, my odometer doesn't work so no hard data on anything. I presume I could work out mpg on one of my upcoming ga-fl runs but honestly it's difficult enough just to make the trip without blowing a charge pipe. I need to order a proper front mount intercooler tubing kit with silicone couplers and t-bolt clamps.
I have put maybe 30 miles on the car since I moved that lump of coroplast, but since I also removed the air dam, there's no comparison.
https://media.daimler.com/marsMediaS...cs-development
They have a few tuft tests which I don't think I'd seen before but the smoke trail, to me seems like the kamm should be worthwhile.
My main complain with the decklid extension was that it's in the way of opening the trunk. The lock is also a button on this model.
I may bring the decklid extension back, I am thinking it should be more of a positive angle to bring it closer to the aero-template.