Found a link for this Diesel Chip for the 3.0 Patrols, have heard the chips are supposed to be pretty good and are fully plug and play for the early 3.0 motors.
Price is abit cheaper than some of the other brands as well
3 year warranty and figures look impressive, thought I might give one a go when I get some cash again..
Anyone else heard of them, look pretty interesting
http://www.chipexpress.com/products/1601/