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Old 12-12-2014, 05:13 AM   #78 (permalink)
Nigel_S
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Quote:
Originally Posted by Old Tele man View Post
...true, but headers designed for *economy* certainly are NOT operating with gasses at mach 0.5 either.
If they are designed for economy then they should be, oversized tubes with slow gas flow definitely hurt performance except at very high revs.
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