I had never planned on adding fog lights to my Si, and I wanted to get more air circulating into the engine compartment, especially around my CAI. So, this is what I decided to do about it yesterday.
All of the pictures are fairly self explanatory.
The wire mesh is a woven .050” diameter 300 stainless steel wire with .100” openings, which allows about 47% ventilation. I purchased a 12” square piece from McMaster-Carr.
The first pics show the front of the car with the bumper (stock), and then removed. There are already a couple of DIY’s that explain the bumper removal procedure, which took me about 15 minutes.
I cut out the openings with a standard utility knife. A fresh blade goes through the plastic like butter. I smoothed/evened the edges with a file.
Using the cut-out piece of plastic, I marked and cut a slightly bigger rectangle of the mesh. Laying it over the opening, I marked diagonal lines at the corners.
With a bench vise and pliers I bent the corners of the mesh to sit flush against the plastic. I checked to make sure the mesh rested flatly against the opening.
I was now time to attach the mesh, and for this I chose Bondo. It provides a secure enough grip to withstand the impact of a rock at highway speed, and cures in a couple of minutes – so you have to work quickly.
I made sure that the Bondo would not be visible from the outside after I was done.
I'm not sure I will ever feel any performance difference, but I have to believe the extra air will help. I'm not concerned with water sice my CAI has a bypass valve to address that.
All of the pictures are fairly self explanatory.
The wire mesh is a woven .050” diameter 300 stainless steel wire with .100” openings, which allows about 47% ventilation. I purchased a 12” square piece from McMaster-Carr.
The first pics show the front of the car with the bumper (stock), and then removed. There are already a couple of DIY’s that explain the bumper removal procedure, which took me about 15 minutes.


I cut out the openings with a standard utility knife. A fresh blade goes through the plastic like butter. I smoothed/evened the edges with a file.


Using the cut-out piece of plastic, I marked and cut a slightly bigger rectangle of the mesh. Laying it over the opening, I marked diagonal lines at the corners.


With a bench vise and pliers I bent the corners of the mesh to sit flush against the plastic. I checked to make sure the mesh rested flatly against the opening.


I was now time to attach the mesh, and for this I chose Bondo. It provides a secure enough grip to withstand the impact of a rock at highway speed, and cures in a couple of minutes – so you have to work quickly.


I made sure that the Bondo would not be visible from the outside after I was done.



I'm not sure I will ever feel any performance difference, but I have to believe the extra air will help. I'm not concerned with water sice my CAI has a bypass valve to address that.