definitely not recommended on a td04, you could get away with it on a ct9 and even possible a hybrid. but with the increase in boost and potential spiking boost, you need to make sure the afr's are spot on if you want your engine to last. plus with the increase in exhaust temps i would want something slightly more advanced then a basic fuel controller. but... it is an option, but personally i wouldn't run it on a td04, would if needed an a ct9 though