AEM Bypass Valve - 2 1/2 Inch Cold Air Bypass Valve 20-401S
$49.46
$68.70
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AEM 2 1/2 inch Cold Air Bypass Valve Worried about buying a Cold Air Intake and driving through a puddle and ruining your engine? AEM takes that worry completely away with the AEM Bypass Valve. Placed between the throttle body or MAF (if applicable) and the filter, the Bypass valve opens when the filter has been blocked by water. Don't believe us? Check out this article by Dave Coleman at Sport Compact Car Magazine, where they dyno an NSX (not just any NSX, but the NSX belonging to the founder of AEM!) and dunk the filter in a tank of water "intended to simulate... well, an absolute idiot trying desperately to destroy [AEMs] engine". Bottom line according to Dave? "Use an AEM air-bypass valve"! Not sure which one to buy? You can order any size and in the notes section tell us what car you have and what AEM Intake, and we'll cross reference it for you and send the correct one!
