The stock sealing rings are also removed and reused on the new Garrett interooler.
This shows how the Garrett intercooler perfectly bolts in using the OEM mounts and charge pipes.
The OEM charge pipes bolt directly to the intecooler end pipe. This direct bolt-in makes for an easy installation.
The Garrett intercooler is huge and really fills the space under the OEM bumper beam.
After the installation of the intercooler, the stock air guides don’t fit anymore because the new interooler is much bigger and the end tanks have a higher volume. You could trim the side air guides to fit the new end tanks as shown here but we didn’t test the car that way. Refitting these parts could help if you want to take the time to do it, because air follows the path of least resistance and you want the air to flow through the core instead of around it. The top guide no longer fits but the new intercooler fits pretty tightly against the bottom of the bumper beam making it superfluous. However, it is not essential that you do any of this and we did not test the intercooler with any of the stock guides in place at all.
For our testing we mounted thermocouples before and after the intercooler so we could datalog the inlet and outlet charge air temperatures to determine its effectiveness as a heat exchanger.