depends on the year LML. 11-13 had some issues with the CP4 more so than the later years. there is also a couple other issues to watch out for in those years. personally id get a 15.5-16 if it were me for the newer body style and updates. Sinister and a couple other places offer a kit now that puts a filter in place incase a cp4 goes. it cost 7k cause dealers rape you. they claim you need to replace everything from cp4 all the way to the injectors (fuel rails, fuel lines, sensors, etc). a good sonic cleaner will get the junk out of the hard lines/rails. id then see if any injectors actually plug up or are bad. you will know quickly and they are easy to change. then just replace the bad ones. Otherwise, replace the CP4 every 100k and roll on. there is also a cp3 conversion but unless you have a tuner that can get in teh truck and tune it, wouldnt do it. the scaling of the regulator is a pain in the ass and requires alot of fine tuning that most big guys never take the time for.Like to hear the stuff about the Dmax trucks too, as that is the next planned vehicle. Planning to stay stock with a cold air intake on an LML, and looking for one in the 40-80K mile range. I was reading that when the CP4 goes out, it wipes out the entire fuel system costing 7K+ in repairs. Is that true? and if so, is it possible to replace it at a certain mile interval for a cheaper price and save the rest of the fuel system?