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Jim2 Jim2 is offline
7.0:1 > 11.3:1
Join Date: Oct 2003
Location: Calgary
Posts: 1,878
Billjam, my 79 930 stock isolators had an ID of 38mm. Compare these to a set of 1989 930 isolators I had which were far smaller, about 32mm. For effective use of the 38mm isolators you would port the manifold openings and cylinder heads, though you may no longer be interested in doing this.

Last edited by Jim2; 07-04-2008 at 07:48 AM..
Old 07-04-2008, 07:45 AM
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