Borla engineered this axle-back exhaust specifically for the 2.7L Ford Bronco. The aggressive ATAK sound level provides a more exciting drive without any drone. The entire assembly is coated black with a high-temperature finish. The system uses a 2.5in inlet that flows into a 2.75in pipe and exits through dual 2.5in tail pipes with a single 4in round black coated T-304 stainless steel tip on each tail pipe. A custom muffler hanger design tucks the hanger out of sight for a clean appearance. T-304 stainless steel construction adds durability over the stock exhaust, while ultra-smooth mandrel bends and precision CNC manufacturing ensure maximum flow and an accurate fit. This axle-back installs behind the factory catalytic converter and retains all factory emissions equipment. It is made in the USA and backed by Borla's Million-Mile Warranty.
Specifications:
- System type: Axle-Back exhaust system
- Sound level: ATAK (aggressive)
- Material: T-304 stainless steel
- System layout: 2.5in inlet into 2.75in pipe, dual 2.5in tail pipes
- Tips: single 4in round black coated T-304 stainless, one per tail pipe
- Finish: high-temperature black coating over the entire assembly
- Hidden muffler hanger design
- Construction: mandrel-bent, CNC-manufactured, direct bolt-on
- No-drone design
- Made in the USA
- Warranty: Borla Million-Mile Warranty
- Part number: 11978CB
Vehicle Applications:
- 2021 Ford Bronco
- 2022 Ford Bronco
- 2023 Ford Bronco
- 2024 Ford Bronco
- 2025 Ford Bronco
- 2026 Ford Bronco
FAQ
What does the Borla 11978CB fit?
It fits 2021-2026 Ford Bronco models with the 2.7L V6 engine and 4WD. See the Vehicle Applications list for the full year breakdown.
How loud is the ATAK sound level?
ATAK is the most aggressive of Borla's three sound levels. It delivers the loudest, most assertive tone of the range while still carrying Borla's No-Drone guarantee to avoid interior drone.
Is this axle-back street legal?
This axle-back bolts on behind the factory catalytic converter and does not remove or alter any factory emissions equipment. Borla states that its street cat-back, rear-section, axle-back, and muffler systems are 50-state emissions legal. Confirm emissions compliance for your specific year and model before purchase.
What material and warranty does it have?
It is built from premium T-304 stainless steel with a high-temperature black coating, mandrel bent and CNC manufactured for an accurate bolt-on fit with a hidden muffler hanger, made in the USA, and backed by Borla's Million-Mile Warranty.
