Description
Add an aggressive, high-performance exhaust tone to your Mustang Convertible with the Borla 11939 ATAK Axle-Back Exhaust System. Engineered specifically for 2015–2023 Mustang EcoBoost and 2015–2017 Mustang V6 convertible models, this system delivers BORLA®’s most extreme and crisp ATAK® sound while maintaining zero drone inside the cabin.
Featuring 2.25″ T-304 stainless steel mandrel-bent piping and dual 4″ single round rolled angle-cut bright chrome tips, this system enhances both performance and appearance. BORLA®’s patented straight-through multi-core muffler design improves exhaust velocity, unlocking additional horsepower, torque, and throttle response.
Note: This system fits convertibles only and does NOT fit vehicles with the Active Valve Exhaust System (quad tips).
Product Specifications
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Brand: Borla
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Part Number: 11939
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Series / Sound Level: ATAK®
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Part Type: Exhaust
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Type: Axle-Back Exhaust
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Material: T-304 Stainless Steel
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Tubing Diameter: 2.25″
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Tip Style: Single round, rolled, angle-cut
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Tip Finish: Bright chrome
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Tip Size: 4″
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Tip Exit: Single split rear exit
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Active Exhaust Compatibility: Not compatible
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Warranty: Million-Mile Warranty
Vehicle Fitment
Compatible Models
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2015–2023 Ford Mustang EcoBoost (Convertible Only)
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2015–2017 Ford Mustang 3.7L V6 (Convertible Only)
Requirements / Exclusions
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Does NOT fit vehicles equipped with Active Valve Exhaust (quad-tip systems)
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Fits automatic and manual transmission
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Rear-wheel drive






