AEM 20-401S 2.5" Air Bypass Valve Review

Average Reviews:

(More customer reviews)I purchased this product for my AEM Cold Air Intake system to elmiminate the chance of hydrolock, a condition that occurs when your engine ingests water, which cannot be compressed like air, causing damage to your piston rods.Unfortunately my order arrived damaged, with a small tear in the foam housing of the valve so I did not have a chance to install it.I would like to give a few tips to check before purchasing this product though.First off, this valve is large it is about 2 times the size of your intake pipe and cannot touch anything after it is installed, so make sure you have the clearance around the pipe to ensure that it will fit.Secondly you will have to cut a section of your intake pipe, or have someone else do it, either way you probably don't want to purchase this if you are not comfortable with making this modification.Although I had problems with my product I am in no way suggesting that you will.The damage to mine was in shipping, not bad manufacturing and I would like to recommend this as a worthy addition to the Cold Air Intake System.

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Product Description:
AEM's patented Air Bypass Valve virtually eliminates the chance of hydro-lock in the event the filter of your AEM Cold Air induction system becomes submerged in water. On most systems, the valve installs along the upper portion of the inlet pipe and shuts down induction at the filter when it becomes submerged, rerouting air through its external diaphragm to keep water out and air flowing in. Check with your dealer or call AEM for more information on air bypass valve installation locations. The AEM Air Bypass Valve is C.A.R.B. exempt on AEM Cold Air induction systems only and is NOT for use on forced induction vehicles. Patent #6,394,128.

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