COBB Subaru VA STI Front Mount Intercooler Subaru STI 2015 - 2021
Table of Contents
Congratulations on your purchase of the COBB Tuning Front Mount Intercooler Kit. The following instructions will assist you through your installation process. Please read them first BEFORE beginning the install and familiarize yourself with the steps and tools needed. If you feel that you cannot properly perform this installation, we HIGHLY recommend you take the vehicle to a qualified and experienced automotive technician.
IMPORTANT! Installing this kit will require custom tuning or utilizing an appropriate Stage Power Package map. Please consult with COBB or an authorized ProTuner in your area.
Inside the passenger's side front wheel well, remove the (3) push clips using a flathead screwdriver.
Inside the driver's side front wheel well, remove the (3) push clips using a flathead screwdriver.
Remove the (3) 12mm bolts holding the undertray on.
Remove the (2) plastic clips on the rear of the undertray, located near the transmission. The undertray is now free to remove.
On the underside of the front bumper, remove (11) push clips - (9) bottom, (1) driver side, (1) passenger side.
On the top side of the front bumper, remove (3) push pins, and (6) 10mm bolts. Remove the black trim/weatherstripping.
Release pressure clips on each side by the wheel arches by applying a small about of pressure outwards. Gently pull the front bumper away from the car. It helps to have (2) people here. Not much force is required.
As you remove the bumper, be wary of the foglight harness connectors on both the driver and passenger side. You have enough length in the harness to gently set the bumper down while you disconnect the harness.
Remove the bumper beam. There will be (8) 12mm bolts bolts - (4) on each side.
Flip horn orientation as depicted.
Windshield Washer Fluid Reservoir Relocation and Coolant overflow
Install a 3" - 2.5" reducer using a #48 clamp loosely.
Install a 2.5" coupler on the lower cold pipe usuing a #44 clamp loosely.
Attach the lower cold pipe to the FMIC intercooler using a #44 clamp.
Install a 2.5" coupler on the mid cold pipe using a #44 clamp loosely.
Install the provided rubber grommet and aluminum bushing into the bracket on the mid cold pipe.
Remove the metal bracket attached to the headlight harness to allow for more clearance. There is a small Phillips head screw that you will need to remove. Then, there is a clip to release the bracket from the harness. You can use a flathead screwdriver to assist in releasing the clip.
Using a provided zip tie, secure the harness.
Attach the mid cold pipe to the lower cold pipe using a #44 clamp loosely.
Install a 2.5"-2.75" reducer to the upper cold pipe using a #44 clamp loosely.
Use teflon tape or thread sealant to attach the provided bung to the upper cold pipe, 5/16" hex key.
Attach the upper cold pipe to the to the turbo and mid cold pipe using (2) #44 clamps.
Attach the BPV adapter to the 35mm coupler using (2) #20 clamps.
Attach the assembled BPV adapter to the upper cold pipe.
Attach the BPV to the BPV adapter reusing your OEM BPV gasket and hardware, M8 12mm head.
NOTE: You may need to rotate the BPV to align it with the adapter for an easier install.
At this point, verify clearance and tighten everything until it's secure.
Attach the foglight harness connectors on both the driver and passenger side.
Gently reattach the bumper to the front of the car. It helps to have (2) people here. Not much force is required to insert the clips.
Attach the black trim/weatherstripping on the top side of the front bumper using (3) push pins and (6) 10mm bolts.
On the underside of the front bumper, insert (11) push clips - (9) bottom, (1) driver side, (1) passenger side.
Before installing the undertray, you will need to trim a small portion of the undertray to clear the lower intercooler pipes on each side. Each application will vary slightly, so we've provided a basic guideline that you can use as a starting point.
Install the (3) 12mm bolts securing the undertray.
Attach the (2) plastic clips on the rear of the undertray, located near the transmission.
Inside the driver's side front wheel well, insert the (3) push clips.
Inside the passenger's side front wheel well, insert the (3) push clips.