Dane Bramage

Its an intercooler, and no, they are not the same thing. An intercooler is used to cool the incoming air before it get's compresed by the Turbo (you can see the turbo just to the left of the valve cover).

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Every passing hour brings the Solar System forty-three thousand miles closer to Globular Cluster M13 in Hercules — and still there are some misfits who insist that there is no such thing as progress.
Kurt Vonnegut - Sirens of Titan