The Borla 11939 is an ATAK rear-section exhaust for 2015-2023 Ford Mustang models with the 2.3L EcoBoost or V6 engine. It is designed for convertible models and does not fit vehicles with the Active Valve Exhaust system (four tips). It delivers the aggressive ATAK sound and features bright chrome on T-304 stainless steel tips. Borla builds this system from premium T-304 austenitic stainless steel with patented straight-through, multi-core technology and ultra-smooth mandrel bends for maximum flow and a precise CNC-manufactured fit. It is handmade in the USA and backed by Borla's Million-Mile Warranty.
Specifications:
- System type: rear-section (axle-back) exhaust
- Sound level: ATAK
- Material: T-304 austenitic stainless steel
- Construction: patented straight-through, multi-core, mandrel-bent
- Tips: bright chrome on T-304 stainless steel
- Fitment: convertible models; not for vehicles with Active Valve Exhaust (four tips)
- Made in the USA
- Part number: 11939
Vehicle Applications:
- 2015 Ford Mustang
- 2016 Ford Mustang
- 2017 Ford Mustang
- 2018 Ford Mustang
- 2019 Ford Mustang
- 2020 Ford Mustang
- 2021 Ford Mustang
- 2022 Ford Mustang
- 2023 Ford Mustang
FAQ
What vehicles does the Borla 11939 fit?
It fits 2015-2023 Ford Mustang convertibles with the 2.3L EcoBoost or V6 engine. It does not fit vehicles equipped with the Active Valve Exhaust system (four tips).
Does it work with Active Valve Exhaust?
No. This system is not designed for Mustangs equipped with the factory Active Valve Exhaust system, which uses four tips.
Is this Borla exhaust street legal?
Borla classifies this as a street rear-section system and publishes that its street cat-backs, rear sections, and mufflers are 50-state emissions legal. It mounts behind the factory catalytic converters and removes no emissions equipment, so confirm legality for the specific model year and state before purchase.
How loud is the ATAK sound level?
ATAK is Borla's most aggressive street sound tier and delivers the highest decibel output in Borla's street line, tuned to stay clear and focused at high volume with no interior drone.
Where is it made and how is it warranted?
Borla exhaust is handmade in the USA from T-304 stainless steel and is backed by Borla's Million-Mile Warranty.
