Yep...same reason the Patrol supercharger won't work. The VK56VD heads are different than the VK56DE. To my knowledge, there is no aftermarket intake. It'll have to be a custom one-off fabrication. If you want more speed other than the currently available mods and custom tune, I would suggest the dual nitrous kit from NX: http://www.nitrousexpress.com/190286/1/ ... stems.html