I never said it was the FI exhaust, just the same style. I however have OEM resonators and the Magnaflow race mufflers instead of the FI setup, and yep they are stock cats. The x-pipe is actual FI back from the cats though to the x-crossover. The rest is custom.
KEVTEX is right, the extra bends and longer exhaust path move the frequency at which the exhaust resonates to eliminate drone. It is similar to a Helmholtz resonator but technically it is called a side brand resonator, running at a quarter the wavelength of the pipe resonance frequency. Similar though, much like the resonators on stock intake tubes!
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2013 Ford Mustang GT
374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd
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