what kinda benefits? idk push button power lol okay but in all seriousness the only good thing about the spacers is the kinda cool whistle noise. They are worthless otherwise doesn't matter what brand save your money get a tune or something else. By far a custom tune will be the best bang for the buck. Its only 300 for a Nelson tune. You will get increases across the board. The spacers are a waste. Some one please close this thread.