It will be whatever i want it to be.. The real problem is your thinking about it wrong cause i did not elaborateFirst off, no extender is a foot and a half long..... if it were you would get laughed off the track.
Most are between 4-8"
They are not worth much only 1-3 hundreds in a 4 second pro mod.
But, races are won by thousanths, and the extenders keep all the cars competing even with the same front end over hand as they all are different.
Then its a waste.. Unless i got some real side by side racing going on..lol.45".............and less than .01 on a fast car.