[psiperformance]

we sell the tuner with a preloaded can tuned for the JLT if you purchase the package..

you will pick up much more power if you use the jlt and the caned tune..

the reason is in order to keep the kn from needing a tune they have to keep the inlet pipe where the mass air is the same size as factory while the jlt can be much larger since you tune for it.

You CAN drive the car with a stock tune in the ecu with a jlt however the car will be lean and you would not want to be getting on it at all it would strictly be drive it around no heavy throttle.

however it may if driven long enough trip a lean 02 code.