He's talking about the resonator in the center of the exhaust system...
It can be eliminated and replaced with an "X-Pipe" (below), "H-pipe", or just straight pipes that allow for better flow and more sound. X-Pipe Kits available for around $150. Just google it.
Pretty easy mod, but there are a lot of great sounding aftermarket axel-back mufflers out there too. I chose Solo w/ J-Pipes and love 'em. Just the sound I was looking for and no drone at all.
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2013 1SS/RS Coupe L99, Stainless Power Works LT Headers, SCT X4 Custom Tune from RDP, CAI Inc. Air Intake w/ Apex Scoop, VMAX CNC Ported Throttle Body, Solo Axle-Back Exhaust w/ J-pipes, Apex Catch Can, Husky Splash Guards, Heritage Grille, 3D Carbon Rear Spoiler, Oracle Chrome Turn Signal Bulbs, GM Reverse Light Trim Billets, Gorilla Black Locking Lugs, Emblem Pros Retro SS Badges/Custom Retro SS Kickplates/Under-hood Bowtie, 35% window Tint, Nitto Motivo Tires (6-8-18)
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