I wont tell you which one to get.. but will tell you the differences.... ractive is T6 aluminum (aircraft),,,,, so is injen...... ractive come w/ a paper filter dyed red to look like K7N..... so does injen..... you can add a k&N to either one..... they will give you very similar hp gains +-1 hp.... you will not feel this +-1 hp unless you are a pyschotic freak.... injen looks nicer.... 200 dollars more nicer that is... ractive in Canada is about 110, you can then install (VERY EASY).. and injen, from what i have seen, is about 225-250 US.. that more than 3 bills canadian. So its up to you... personally i would go w/ ractive (i did at first, but now am making my own.. dont ask...) but if i had money to throw, i would go w/ injen.. oh yah... and AEM is made of.. go figure.. T6 aircraft aluminum... but it comes w/ k&n....