I have a 00' XJ w/ 4.0, the fuel system is stock w/ K&N fipk. I want to upgrade my injectors to get more fuel, ie. power. I have the 04854181/2056B15112 in stock, I also have a set of 53032145AA/2059W10383. Will they work, will I have to do anyting with the computer, or timing? :naughty: