i am pretty familiar with them in fairly modified ITB's but has far as a pretty stock set up with minor mods im not sure. i know some people who have internal build ups and have used them with good results. they seemed to give a smoother acceleration and all around better electronic workings. they also increased the gas mileage sligthly and had brighter headlights. i guess they aren't too expensive of a mod but if you are still pretty much stock i'd spend the money elsewhere on more noticeable performance gains