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The 2011–2021 Subaru WRX and STI platform is built for performance, and the MBRP Armor Pro Axle-Back Exhaust is engineered to match. Crafted from premium T304 stainless steel with smooth mandrel-bent 2.5" tubing, this straight-through axle-back eliminates the factory muffler to deliver up to 40% more exhaust flow and the aggressive dual-exit tone the WRX/STI community expects. Two polished 3.5" tips complete the look with MBRP's signature styling.
MBRP's Armor Pro Series represents the pinnacle of their gas exhaust lineup — T304 stainless steel construction that's easy to maintain, built to withstand extreme conditions, and backed by a Lifetime Warranty. The bolt-on design retains OEM hanger locations so installation is clean and straightforward, and clamps are included. Whether you're daily driving a WRX or tracking an STI, this axle-back is the performance upgrade the platform was built for.
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