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Old 11-11-2009, 01:31 AM   #6 (permalink)
Robispec
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No its for the sexy sound!

YouTube - Robispec Nissan 370Z single exhaust

the twin exhausts I have seen are 40-50 mm the single is 3" = 77mm

the 3" flows 4 times what a 40mm single 3 times a 50mm and 2 times a 60mm would so 40mm + 40mm = 2x the flow...vs 4x with the "BIG single"
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