Installing the flange to the air box will require a 3-⅝-inch diameter hole to be cut into the bottom of the box. An existing drain hole in the stock air box is used to locate the flange. The inside diameter of the flange is used to scribe a circle on the bottom of the air box. Cutting the hole can be performed using a keyhole saw, saber saw, Dremel-type tool or a hole saw. The same flange is used to locate the (4) ¼” Ø holes that are drilled through the air box to attach the flange. Removing and re-installing the stock air box with the intake duct attached is done using common automotive hand tools. Our cold air kit come complete with air box flange, duct, inlet port, hose clamps, fasteners and detailed instructions with pictures.
Installation Instructions PDF