Don't know but it says it helps from hydro lock and it doesn't take away that much power.

Slight loss of power everyone says

Still waiting to put it on but after reading all the reviews i'm not sure if I even want too.

looks important....

costs about $40 dollars too much. not effective unless filter is completely submerged in water. and from my standpoint, it probably takes away some performance.

waste of money. unless ofcoures you often drive through swamps, rivers or lakes. only works when filter is COMPLETELY SUBMERGED. i am going on my 3rd winter without the valve. i have never experienced any problems whatsoever. i would say it takes away from performance as well. the object of a COLD air intake is to suck in COLD AIR. the bypass valve has to be sucking in some extremely hot engine air. and again, only works when COMPLETELY SUBMERGED.

Keeps your engine from drowning in water

Engine will be thirsty from lack of water. hahah

This product is good overall. Unless you like to spend alot of money on a new motor... I would recommend buying one. From researching for the best place to cut into the intake... I found cutting and placing the bypass valve on the lower part of the straight pipe closest to the filter is the best place. I know this because I went thru 2 cold airs before finding the right spot. U cannot go wrong. I've had it on now for 5 months with no problem. And it has been raining alot here with 5-6 inch puddles in the street. Hasn't swallowed any water. The bad thing is AEM doesn't know where the best place to put this. So you have to experiment yourself.

Its good to have cuz long term water induction may result to rusting the pistons in the engine.

You gotta find the right spot for it. Different intake designs have slightly different properties i guess.

I jsut got the B.V. couple days ago. Even with the installation guide, finding the right spot to cut the intake was pretty confusing. at first it said to cut as high up the pipe as possible on the straight part... When i took it for a test run, my 97'accord started to sound like a mustang when i accelerate. but funny part about it was...it felt like a mustang too. The vehicle's acceleration had a delay. So i got kinda worried and re-attached the intake together with a joint. But this time, i installed it on the lower mid section of the pipe. And BAM! The vehicle was moving smooth again.

-Saves your car if you happen to hit some nice puddles.

Def. not

If your using an AEM cold air intake I would advise installing a B.V. I never thought i would hydrolock my car untill it happened. And to think i could have saved 2grand just by purchasing a b.v. I see some people wrote in complaining they "lost some sound" WTF is that $hit! I would rather hear alittle less noice than a very bad valve tap followed by the motor takin a shiznit. I recently swaped the motor out for a tight b16, and installed the b.v. I recomend to anyone who thinks it can't happen to them to install it. Peace

none

waste of money + install time

I agree with above review, on the Accord the intake follows the same path as the stock airbox, big waste of time, plus hacking thru your intake cant be good, if your that nervous, buy a short ram with a heat shield. I live in New England, had the intake thru fall/winter (lots of snow this year) no problems, slow down if youre driving thru a river, otherwise youre groovy

-Protects engine from hydrolock -Still have a CAI - IT'S ALL ABOUT THE POWER -I guess it looks good?

-I THINK water still gets in, I don't see how the B.V. can work that miracle

1Bought it already installed on CAI. Because of that fact, I can't state whether or not any performance gains/losses are present. Intake sounds sweet to me, though others have said that B.V. makes it quieter. I bought it b/c it was already installed, but the sales guy said if it were purchased seperate, it would have been $36. Overall, I paid $212, w/ tax. I know some people who paid more for just the intake than I did. I think water still gets in, but it's hydro-lock you really have to worry about. Like if you were just getting done running the 800 meter (track fan) and somebody just gagged you. I haven't noticed any damage to my car, and it's currently the rainy season, unless you call hurricanes a season. OH, gained a proven 3 mpg in moderate driving on mid-grade gas! But that's not really relevant to the B.V.

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OEM Air Box Assembly - No water woes, but man, what a piece when it comes to airflow

i guess the peace of mind

the loss of power, sound etc

i havent used mine yet all this cutting have me a little scared you dont pay 200 plus to cut in half, im just looking for more response to see if i do mine.i bought it for the peace of mind but the other reviews aint helping much

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dont know

Its an added sense of comfort even if you hardly ever drive in the rain. It made only 1/4 horsepower difference on the dyno. If you ask me, 1/4 horsepower is worth loosing to not blow up your engine

Very slight noise reduction in Vtec

This is a great product. I hydrolocked my car in a flash flood. the water was only about 6 inches deep. I hardly ever drive my car in the rain but this storm came out of nowhere. I never actually thought it would happen.

I found absolutely None. -It may work when the filter is fully submerged under water for the Bypass Valve to operate. ~ Saw the testing by a shop in CA of this product.

-Loss of Power (Maybe) -Cutting the Intake Pipe -Sucks in water any other time -No way to stop water from leaking in -Common in all Cold Air Intakes

Like the the other guy said, it's just another way for the company to make more money off the customers whose hooked on buying an AEM product.

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This is with a Custom AEM CAI System