I also used Cains spoiler on my 2014 4/4 and used the two brake ducts inlets to duct cool air up to oe air box with K+N filter fitted. Used flexible ducting up to homemade collector box and then on to air box. Cost about 15 pounds + K+N filter 28 pounds...cost effective modification

" I LOVE THE SOUND OF THROTTLE BODIES IN THE MORNING " (ROBERT DUVAL IN "APOCOLYPSE NOW " )