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AEM Cold Air Intake System - 21-499P

Cold Air Intake System
  • $477.99
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  • Ships By 11/19
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AEM Cold Air Intake System Part #21-499P Customer Reviews

Average Rating

5 Customer Reviews


Reviewed by Michael B (Pittsburgh, PA) — Apr 06, 2015 11:20 AM

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0 of 1 people found the following review helpful.

Would of prefered more HP but apparently you can only gain so much from an intake. Now i have to investagate whether a new exhaust or new fuel injectors and iridium NGK spark plugs can help me break that 300 HP Milestone.

Nissan Altima CAI

Reviewed by Bradley G (Vadnais Heights, MN) Reviewed for a 1971 Chevy C/K Pickup — Oct 25, 2013 3:33 AM

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1 of 1 people found the following review helpful.

The AEM CAI System for the Nissan is a very well-built and quality product. This is my second AEM Intake system that I have installed and I believe the the instructions are very clear and detailed for each application. It is also very nice to know that I have a solid company like AEM and AutoAnything behind me if needed.

Extremely Satisfied

Reviewed by Emilio R (Garden City, NY) Reviewed for a 2008 Mitsubishi Lancer — Jun 05, 2011 8:19 PM

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3 of 3 people found the following review helpful.

I rarely EVER take the time to write a review, but for this CAI, it only seemed fair. Before purchasing this product I did some extensive research and found that the AEM no-oil filter came heavily recommended. As a result I started looking at the entire AEM CAI as an option. After deciding that the AEM CAI offered the best quality product, I looked for the cheapest price possible. I must have searched at least 10 different websites, and AUTOANYTHING by far offered the best price! I even used a $25 discount sale the site was having to lower the already lowest price I found. I received it in 5 business days as promised and installed it myself with the enclosed and extremely helpful directions. There is also a youtube video for how to install this exact product on an ALTIMA. The result: AMAZING sound, improved MPG (measured before n after) and you can FEEL the increased performance!...I would highly recommend this product to anyone who appreciates quality and is serious about what they install in their car.

Highly Recomended

Reviewed by Naomi R (Fort Hood, TX) Reviewed for a 2008 Nissan Altima — Sep 28, 2009 9:32 PM

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5 of 5 people found the following review helpful.

I purchased and installed my new AEM cold air intake for my 08 Altima Coupe 3.5L last week. I have noticed a better pick up off the line and more engine responsivness. I was hoping for an increase in gas milage but my gas milage went down. (possibly due the way I have been driving :)) The intake looks great under the hood as well.

CAI w/ Heat Shield

Reviewed by DANIEL P (Jersey City, NJ) Reviewed for a 2008 Nissan Altima — Nov 16, 2008 10:21 AM

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6 of 6 people found the following review helpful.

Easy install, amazing sound (particularly above 3500 rpm), price a little steep but you get the quality. Spec's call for a 3-4% increase in whp on my 270 hp coupe, could not feel the difference but saw it as my rpm races to redline much faster than stock. Definitely pleased with the purchase and plan on reaping the full benefits when I pick up racing lines y-pipes and set up the borla cat back system.