Borla 11939 ATAK Axle-Back Exhaust for 15-23 Ford Mustang EcoBoost/V6 Conv 2.3L

Vehicle Fitment

• 2015-2023 Ford Mustang Convertible (2.3L EcoBoost I-4 / 3.7L V6, RWD) - fits convertible models WITHOUT Active Valve Exhaust (4 tip) systems; NOT compatible with coupe/fastback or active exhaust variants. Fitment confirmed through 2023. 2024-2025 coverage unconfirmed at time of listing.

Features

• Aggressive ATAK™ high-output sound profile with deep, powerful tone and minimal drone
• Premium T-304 stainless steel construction for superior corrosion resistance and durability
• Mandrel-bent tubing for optimized exhaust flow and reduced backpressure
• Straight-through multi-core muffler design for enhanced performance characteristics
• Single 4" polished round rolled angle-cut tip for bold rear styling
• Direct bolt-on installation using factory hangers and included hardware - no cutting/welding required
• Designed specifically for convertible applications where coupe fastback is not applicable
• Backed by Borla's Million-Mile Warranty for long-term reliability

Specifications

• Part Number: 11939
• System Type: ATAK Axle-Back Exhaust
• Material: T-304 Stainless Steel
• Pipe Diameter: 2.25"
• Exit Style: Single split rear exit
• Tip Size: 4" Polished Round Rolled Angle-Cut
• Engine Compatibility: 2.3L Turbo I-4 EcoBoost, 3.7L V6
• Drivetrain Compatibility: Rear-Wheel Drive (RWD)

Included Components

• 1x ATAK Axle-Back Exhaust Assembly (left & right)
• 2x Muffler Assemblies
• 1x 4" Polished Round Rolled Angle-Cut Tip
• 1x Complete Hardware Installation Kit
• 1x Installation Instructions

Product Description

The Borla 11939 ATAK™ Axle-Back Exhaust System is a performance-oriented upgrade engineered specifically for 2015-2023 Ford Mustang Convertible models equipped with the 2.3L EcoBoost turbocharged four-cylinder or 3.7L V6 engines and rear-wheel drive that **do not feature an Active Valve Exhaust (4 tip) system**. This system replaces the rear exhaust section behind the axle with an aggressive ATAK sound profile, delivering a deep, commanding exhaust note with minimal drone in the cabin - perfect for enthusiasts who want a bold performance sound without sacrificing daily-drivable comfort.

Constructed from premium T-304 stainless steel with mandrel-bent tubing and Borla's straight-through multi-core muffler design, the 11939 enhances exhaust flow and performance characteristics over the factory system. The single 4" polished round rolled angle-cut tip adds a striking visual element to the rear of the vehicle, and the system installs easily using factory hangers and included hardware without cutting or welding. Backed by Borla's Million-Mile Warranty, this ATAK axle-back exhaust offers a lasting combination of aggressive sound, improved flow, and durable construction for Mustang owners looking to elevate their driving experience.