Spectator racing.

Lawn mower racing.

I prefer this.

Specifically, the honest Porsche 964 RS America. Not pretentious, but gathers attention nonetheless.

After all these years, the Corvette has to be up there.

In 2008, I was the fastest stock FWD car around the Ring at 8:22. -Cobalt SS

I'd bet in most cases you actually loose HP, but it sounds like added 100hp!

Typically I use both heat and A/C at the same time. Warm dry air.

Although it's automatic on most cars now, I am amazed about how many people don't know about running the A/C in the winter (or anytime) to remove humidity and clear the windows.

Mostly increased induction noise. This predates BMW style induction porting into the cabin of the car. Now this induction tuning can even be found on the Ford Focus ST.

Flipping the air filter cover? I would guess most haver never heard of this, given the modern air box designs don't allow for this.

G Forces.

I would expect the space could be used for upto 4 usb ports.

Late entry, I'm not sure this was mentioned yet, but I see the cigarette lighter going away and being replaced with USB ports for power and charging. They are smaller, more efficient use of space and the defacto charging method for portable devices. Plus there are less smokers now and less of the smokers are using…

Maybe not in a few years, but pneumatic tires days are numbered.

Hopefully everyone follows Ford with the capless fill up and the current removable gas cap becomes history.

I'm surprise this did not make the list. It has the wheels of oil rig transporter and the wipers of an ocean liner, it is the worlds largest truck.

85 MPH Speedometers.

Search eBay closed auctions to gauge the wholesale market price. Also, google the vin number to see if other dealers have tried to sell the car, maybe for less with no luck.

Nothing boring about train horns! Woo Wooooo.