I have the Steeda intake, originally i was running a Brenspeed tune before cams, i can't say it was 25 or 35 RWHP cuz i dint get it Dyno'd but it makes a HUGE difference. I went with Steeda cuz they make quality parts and i think it was the best looking. Don't get caught up in the #'s, you wont really feel the 5 - 10 hp difference the companies claim, all these tests are done in a controlled environment and you will NEVER be in such a perfect setting for your car to make the advertised power.