This 2.25" diameter into the muffler and 2.75" out of the muffler Axle-Back system features the aggressive ATAK(r) sound with no drone inside the vehicle. The exhaust exits through single 4.5" round polished T-304 stainless steel tips on each muffler assembly. Add Mid-Pipe assembly 60222 to create a Cat-Back system. Add Resonator 60624 to Mid-Pipe 60622 for a quieter version of the ATAK(r) system. BORLA(r) Cat-Back and Axle-Back multi-core technology is designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA(r) Sound of Power respected by motoring enthusiasts everywhere.Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit.Best of all, BORLA(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

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