Thread: 987 Exaust Manifold on 986 3.4L
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Old 04-03-2013, 04:23 PM   #3
Johnny Danger
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Quote:
Originally Posted by insite View Post
42mm if i remember correctly
That's small. I run 2.25 inches from the flange, through the primaries - all the way to the catback. The catback has 3 inch inlets and 3.5 outlets.
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