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This 4-inch Borla muffler topped out the UNCC flow bench. Readings were taken at 6 inches of depression and corrected to 20.3 inches (10.5 inches Mercury). The result: 1100 cfm!
Exhaust Science Demystified

 This 4-inch Borla muffler topped out the UNCC flow bench. Readings were taken at 6 inches of depression and corrected to 20.3 inches (10.5 inches Mercury). The result: 1100 cfm!  View Related Article

 

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