The BORLA® ProXS™ Mufflers (formerly called BORLA® Turbo Mufflers) utilize a straight-through design; we do not use chambers or baffles that slow down the flow of exhaust. As such, every one of our universal mufflers are reversible. A center-in/offset-out muffler can also be installed as offset-in/center-out. The same holds true for our center-in/dual-out mufflers.
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