GMC Yukon Hood Scoop does not come with optional ramair kit. Ram Air hood scoop kits are a fully functional Ram Air system by adapting to the OEM air cleaner assembly. The ramair hood kits will come with K&N filter, airbox attachments, all necessary hoses, clamps and attachments. Also included with the fiberglass hood will be the hood scoop grilles and Ram Air decals in the color of your choice. This fiberglass hood system will add approximately 10-15hp.