GTO Twin Turbo Build

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The completed exhaust manifolds side by side.

A shot of one of the Garret GT3071R Turbos.

The exhaust manifolds are installed and the turbos bolted into position. The next step is to remove the front bumper cover and locate a position for the air to air intercooler.
We position a Spearco Intercooler core where it will get optimum airflow. We decided to fab our own end tanks due to the GTO's unique front bumper shape. With the front bumper cover back on, the intercooler is barely noticeable and looks like it will receive good airflow.
Next, we pull the bumper cover back off and fabricate the charge piping from the turbos to the intercooler, and then to the intake. The passenger side compressor discharge piping goes down behind the headlight. Notice the new ABS module location on the frame rail.
The drivers side compressor discharge pipe goes down along the fender behind the headlight leaving room for the intercooled charge piping. From the fender, the drivers side piping then goes along the crossmember under the car to the passenger side.
From there, the drivers and passenger side discharge pipes join together in a custom fabbed Y pipe that is then connected to our custom end tanks at the intercooler. From the intercooler, 3" piping is routed up through the fender well behind the headlight.
And then to the mass air flow sensor and on to the throttle body. The charge piping is competed and ready for coating.
Now we fabricate the passenger side downpipe View from under the car.
Now for the drivers side. View from under the car.
Now that all of the exhaust piping is complete, it is disassembled and sent to HP Coatings along with the turbo exhaust housings for high temp thermal coating.
 

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