Thread: 2 valve vrs 4 valve
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Old 09-15-2007, 11:26 AM   #14
clubracergt1
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Quote:
Originally Posted by Zacharyx
since the SVO's have the NPI sized chamber you would loose .8 or so compression. but nothing a few more pounds of boost would not cure
Or some slight shaving of the head while it's at the machine shop anyway.
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