Originally Posted by abhishriv
i have these as well.. only notice slight difference at highway speeds. put these on when i tuned my car and also put in a high flow drop in filter. noticed a lot more dirt in the air box after installing this. so i guess it is directing more air into the air box at higher speeds. i would say they would probably start having an effect at ~70 mph
Thanks for the info, makes me think twice about them.