The resonator pipes are back by the tips and meet the exhaust at 90 degrees. As they are capped and are perpendicular to exhaust flow, there is no power loss.
I know this because I had the same exhaust before and after the pipes and have noticed absolutely zero loss with them off, just much more comfort due to the reduced drone.
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2013 Ford Mustang GT
374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd
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