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First always check to make sure you have everything you need. With the ATi Vent, there is one piece, so just make sure it is in good condition.
And since we also have the Defi gauge, we want to make sure everything is there and in good condition.
Popping the factory vent out is easy, but does take a bit of force. I found that once you get one corner to pop free, the rest of the vent will come right out.
With the vent out, you will see the outer ring attached to the main body of the vent. Gently pry the tabs away from the main body of the vent and it should come right off.
With the outer ring off, we now have access to the inner ring. The process is the same as the outer ring in which you simply pry the tabs away from the main body, and it will pop right off.
Here you can see the stock outer ring and the ATi ring side by side.
I test fit the ATi ring and gauge in the pod just to make sure everything sat correctly and looked good. Everything was perfect, so I removed the ATi ring so I could prepare the Defi 60mm gauge to sit in the pod.
Use the supplied foam band around the backside of the gauge. You will want to make sure the foam sits snugly against the ATi ring.
Now you can put on the ATi vent ring into the stock vent pod with the gauge attached.
*Note, make sure you can spin the gauge in the pod, but you do want it to have resistance.
Now for the fun part, Wiring the Gauge in!
I wanted to do a hidden install, so I removed the lower and side dash panels to access the wires I would be tapping into.
The side dash panel comes off easily by pulling out and up from the bottom.
You will see one screw behind the panel which you will want to remove.
Also remove the single screw in the lower right hand side of the lower dash panel.
Once the screws are out, the lower panel should pop out with a bit of force. Remember to disconnect the harnesses going to the headlight level switch and cluster dim switch.
I was able to find the wires I wanted using a multimeter. Remember we need a 12V constant, 12V with ignition on, 12V when dash lights are on, and a ground.
For the illumination I used the solid purple wire going to the dimmer switch, this will connect to the white wire from the Defi gauge.
Unwrap the factory harness loom to access the wire you need.
We used vampire taps, but you could also splice and solder the wires in.
Next I wanted to find the 12V constant. In the fuse box harness, locate the solid light green wire and tap into that. You will use the Red wire from the Defi gauge.
And for 12V with ignition on, I used the Red/Blue wire from the fuse box harness, which will be attached to the Orange wire from the Defi gauge.
And for the Ground I used the factory bolt going into the dash beam just above the fuse box.
When I tried to install the pod and gauge, I did not like the way it pinched the gauge harnesses between the vent and the internal ducts, so I decided to drill two small holes and run the harnesses through that. You do not have to do this, but I think it makes for a clean install.
I wanted the hole to be small enough to not allow air to escape, which means that it is smaller than the harness clip, so I had to de-pin the harness. *Note, make sure you take a picture of the orientation of the wires for reference.
With the pins out, you should have enough room to slide the harness through the hole, it should be a tight squeeze.
Push the harness up through the hole.
Now re-pin the connector.
For the Boost sensor I first routed the harness through the firewall grommet on the driver side and up into the dash.
Repeat the same process for the boost sensor harness as you used for the main gauge harness. Although I did use a smaller bit as the sensor’s harness was a bit smaller.
Plug in the connectors in the back of the gauge to verify everything is correct and working properly before you finalize the install.
Now push the vent pod back into the dash, use a bit of force to make sure it seats down all the way. It will only go in one way, I noticed the larger portion of the vent went towards the passenger side of the car.
Now clean up the wiring harness. I like to re-use the factory covers to get as close to an OEM look as possible.
Use electrical tape and zip ties to cover and secure the harness.
Plug in the harness to the dimmer/headlight panel, install the lower and side dash panels, hook up the boost sensor to a boost/vacuum source and secure the sensor. Double check that everything looks good and Enjoy your new gauge pod and boost gauge!