Here is the bottom of the airbox, with a fiberglass air scoop mounted. Whle the opening on the front of this scoop
is slightly larger than stock, the scoop does not increase the size of the airbox.
Here is the rubber boot securely inserted into the airbox and sealed onto the intake. Often during an install,
a mechanic or owner will not get this boot fastened properly which allows unfiltered air to enter the engine.