[vector1]

from open exhaust to 3" inlet dual race muffler that flows 2000cfm total

512tq/510hp to 506tq/506hp

from open exhaust to 2" inlet dual race muffler that flows 900 cfm total

512tq/510hp to 463tq/462hp

from open exhaust to 1.5" inlet dual race muffler that flows 500 cfm total

512tq/510hp to 436tq/422hp

this i find very interesting.