At first I was planning on leaving everything stock, but after a year or so I am craving the sound of the HEMI a bit more. I love Flowmasters and always have and changing out would leave me able to put it all back when I am done playing. I know there are many threads about exhaust but my question is, can I change to the Flowmaster system without any computer modifications? Will I need to get a Predator or will the stock computer be able to compensate enough? Don't want to open a can of worms, not into all that tuning stuff. Old school here and computers are not my thing. Any advice?