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AEM Air Bypass Valve Part #20-402S Customer Reviews

Great buy

Reviewed by Nyron p (Pine hill, NJ) Reviewed for a 2005 Mazda 6 — Apr 13, 2013 4:04 AM

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1 of 2 people found the following review helpful.

For a few bucks to protect you engine is a great buy in my book

good sh*t

Reviewed by hyo sok h (DALLAS, TX) Reviewed for a 2002 Honda S2000 — May 12, 2012 8:26 AM

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1 of 8 people found the following review helpful.

GOOD SH*T!!!

best product out there n came with all hardware

Reviewed by Chris E (Bellows Falls, VT) Reviewed for a 2000 Honda Civic — Mar 09, 2012 3:03 AM

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1 of 2 people found the following review helpful.

Would def buy from you again n very happy with. Aem product

aem bypass

Reviewed by James C (Coral Springs, FL) Reviewed for a 2011 Honda CR-Z — Feb 25, 2012 4:38 AM

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1 of 2 people found the following review helpful.

Works just as described. Fit perfectly.

installed

Reviewed by A. K (Jamaica, NY) Reviewed for a 2002 Honda Accord — May 19, 2009 7:00 AM

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17 of 21 people found the following review helpful.

Auto Anything had a good price especially with no shipping. Took about 4 days from Canada to NY. The Bypass is a simple install. But you do have to cut your Cold air intake. I have a Fujita 2.75 CAI. It fits fine. Just get the right size and cut the tube (use the paper template AEM provides- for the width the bypass will take in the CAI). Clean out the shavings, attach everything, mount everything back. Done. I have not tested the bypass and God willing never will have to. But it provides a little more confidence in rainy weather. Does it affect the driving? Yes. Mostly psychological; confidence in rain and possibility of warmer air seeping in for less hp. (when driving it should not open until the filter is submerged in water). Be safe people use jack stands or ramps when taking the filter off. Don't cut the CAI while still attached to the engine (shavings will get into the engine, you need to clean the pipe out). The bypass itself seems sturdy, but I read reviews saying they don't last long. (I just put it in). I suppose it has to do with placement of the bypass and forces acting on it. I suggest not putting it at a bend or close to one, so it can be flush with the CAI pipe. I hope this is helpful.

AEM Bypass Valve

Reviewed by Chance N (Starkville, MS) Reviewed for a 2004 Nissan Altima — Jul 22, 2008 9:30 AM

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6 of 8 people found the following review helpful.

This is a great product for people like me that dont like to take chances on messing up the motor. It is very easy to install. Would not buy any other brand. Great company to buy from as well.

Great item and will save your engine

Reviewed by Jeffrey W (Stamford, CT) Reviewed for a 2007 Honda Odyssey — Apr 01, 2008 7:00 PM

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1 of 4 people found the following review helpful.

I wish they had told me about this when I bought the intake. I incurred additional expense by having to pay the mechanic to do the work twice. Otherwise I'm very happy with the increased performance of the intake and exhaust.

great product

Reviewed by Robert G (Vestavia, AL) Reviewed for a 2000 Honda Civic — May 10, 2007 9:41 PM

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2 of 2 people found the following review helpful.

I have a lowered honda civic with a full cold air intake so my filter sits about 1.5 inches off the ground. when it rains here you have no choice but to drive through puddles that are at least that deep so the bypass valve prevents my engine from flooding. If you are installing a new intake system the installation of the bypass is just as easy as the gasket would be.

bypass valve

Reviewed by Nou X (Wausau, WI) Reviewed for a 2000 Honda Civic — Apr 07, 2007 10:57 PM

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1 of 4 people found the following review helpful.

Great place to order stuff.

good purchase

Reviewed by Diane C (White Salmon, WA) Reviewed for a 2000 Volkswagen Jetta IV — Mar 14, 2007 8:12 AM

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0 of 1 people found the following review helpful.

Easy to install, very well could save me thousands of dollars. THANKS

AEM Air Bypass Valve - 20-402S

(34)
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  • Part Size:
    2.75" Inlet
  • Part #:
    20-402S
  • 2.75" valve inlet (fits intake pipes with a 2.75" outlet diameter)
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