Evo 8 - Brake Air Guide Install

Mitsubishi offers a set of brake air guides - plastic panels that channel more air towards the center of the front brake rotors. In theory, these should help prevent brake overheating in extreme usage, such as on track. The installation is very straightforward and should take no more than about 2 hours.

All the tools required for this job.

Tools required: Jack, jackstands, torque wrench, 14mm open-ended wrench, 10mm socket, 14mm socket, stubby phillips screwdriver, Dremel tool w/ cutting wheel, metal file.

Start by jacking up the front of the car and placing it on jackstands. Remove both front wheels.

The lower front suspension arm.
This gold bracket attaches the front sway bar to the front lower suspension control arm.

The air guide mounting bracket.
The brake guide brackets will bolt onto these gold brackets.

Bolting the mount in place
With both front wheels in the air, you will have no tension on the front swaybar, so you can safely unbolt these two 14mm bolts, slide the brake guide bracket on, then re-install the bolts. Torque them down to 34-44Nm.

Bolting the mounting brackets in place.
It won't be ease accessing the outer bolt, but you can push the halfshaft boot up slightly to make some more room.

The air guide.
Now that the bracket is in place, grab the correct air guide. Each is marked "LH" or "RH" on the backside.

Air guide bolted on.
Use a 10mm socket to tighten down the air guide bolts. Do not overtighten.

Another shot of the air guide bolted into place.
Here you can see how the guide will direct air underneath the car into the back center of the brake rotor.

The front underbody tray.
The last step before putting the front wheels back on is remove the front undertray. Make absolutely certain that your car is secure on a pair of jackstands, then slide under and start removing the plastic clips with a phillips screwdriver. According to Mitsubishi's instructions, you'll need to remove the two small panels protruding down from the outermost edges of the panel.

The section of the tray needing to be removed.
LH side before removal. I used a Dremel tool with cutting wheel to remove the bulk of the material, then a flat file to smooth it out.

The tray after trimming.
RH side after removal.

Another shot of the tray after trimming.
LH side after removal. When the panel is finished, re-install it, bolt the wheels back on and torque them to ~72ft-lbs.

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