Contour Enthusiasts Group Archives Forums Modifications Duratec Performance High flow air filters...........HP gains?????

Last weekend I replaced my air filter, and decided to just stick in a Purolator for the time being. I guess next time I'll probably go with a K&N or other high-flow air filter instead. I was just curious, for those of you who dropped a high-flow filter into your *stock* air box setup, what are your impressions? I know K&N and others claim 5-10 hp gains, but I am skeptical of that. I would be purchasing one more for longevity purposes. Also, has anyone here actually dynoed their car before and after the air filter installation? Just curious if you saw any gains at all.

Thanks for the info!

i'll tell you that ive never ran a dyno on my car but what i do know is the HP that everyone brags about and claims varied based on mods and motors. i mean think about it......5-10hp for an air filter. why dont the manufacturers just use it then? what do you get if you put one in a 3 cylinder geo? key words are up to. the better companies out there use % instead of set HP #'s. ive had cars that i put a filter in the stock box and thought i felt a difference but its all in your head. now if you open up your intake and exhaust then you'll start to see those #'s. i would recommend the k&n setup though b/c you can keep it forever and cleaner kits are cheaper thank replacing your air filter every x amount of miles. i like mine. id take it over a generic or replacement filter any day!!! dont know if this helps but just my opinion.