2003 Civic Si Cold Air Intake Installation
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We show you the steps to install a Cold Air Intake (CAI) on a Honda Civic. Not an easy job.
Ryan Smith

2003 Civic Si AEM Cold Air Installation.

Our project car is a 2003 Honda Civic Si. If you are a company and have any parts you'd like to see installed from your company please send any inquiries to info@sromagazine.com

Please note that this is just a guide for the installation, and not actual instructions.


Our first product is an AEM Cold Air Intake. It`s red in color. Installation was a little harder than we anticipated. Installation took about 3 hours.

Here are the contents taken outside of the box. You have instructions with tubing and gromets, Clamps etc.

Here is a picture of the stock engine. Things are pretty tight in there.

Installation requires that the front driver wheel be removed. The plastic lining between the wheel and engine have to be removed as well. You will need to cut out some parts of the plastic to get it installed back on.

Here is a closeup shot of the plastic lining.

Take off the top of the airbox. Then Remove the stock airbox by using a 10mm socket and taking off all the bolts around to box. Also remove hoses from air box filter. We were surpised to find a cone style filter already installed.

There is a hidden bolt in front of the fan that needs to be removed as well to get all of the air box pieces out.

This should be removed by now, but we are showing it here becuse the next picture is where it goes. Pictured in his hand is the heat sensor. You'll have to install a small gromet into the side of the intake tube. This gromet is supplied.

Pictured here is the intake tube where the heat sensor taps into. When installing the heat sensor, make sure that the air filter is off. On our first try the gromet fell off and into the intake pipe. So be careful when installing this piece.

We found it was easiest to install this intake by clamping these hoses on outside of the engine and then sliding the intake down into the fender well.

You might need a buddy to help guide the intake tube down into the fender well. The next step would be to install the cone filter onto this end.

Go ahead and clamp up the top pieces.

We had to cut some of the inside lining to put it back on. It wasn't too hard to do with the right tools.

Here it is all buttoned up.

Some hoses have to be re-connected from the original air box. Here is a picture of the intake installed. Not too much to see.

After taking it out for a spin it was a world of difference. The car accelerated much harder than before and also had a great roaring sound to it too. We highly recommend this product.

Also, there is a small vent that could be cut out in the front bumper. It looks like a fog light could go there, but we are not sure.










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