A method of installing an interchangeable intake assembly on an automobile includes removing a stock air intake component, positioning a base member over an automobile intake box such that the aperture receives and engages the automobile intake box, securing the base member using at least one fastener dimensioned to avoid disturbing the automobile intake box, and removably securing an interchangeable flare housing to a second end opening of the base member. The base member may have an interior cavity configured to direct air into the automobile intake box. An interchangeable intake assembly may comprise a base member, an interchangeable flare housing removably secured to the base member, and an LED unit disposed within the housing and electrically coupled to a vehicle ignition system. The assembly may comprise a cotter pin coupling system with a dual-lock mechanism for securing the interchangeable flare housing.

In a vehicle including a cargo bed behind a cabin, a recess recessed forward is provided in a rear portion of the cabin, and an intake duct is accommodated in the recess.