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Registered
Join Date: Feb 2004
Location: pasadena/novato
Posts: 1,510
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FWIW the ID. of the 993 heat exchangers is identical to the SC RS and RSR 3.0 header which happens to be 42mm or 1 5/8th inches. If you have smoothed your heads out and are running some hot cams it should work out pretty well.
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74 911s neverending story. two feet and a jetta for now.
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