Borla ATAK Axle-Back Exhaust System for 2021-2026 Ford Bronco 2.7L

The ATAK Axle-Back Exhaust System gives the rear exhaust section Borla's ATAK voice, the most aggressive of its three sound levels. Mandrel-bent T-304 stainless steel gives it smooth flow and long-lasting corrosion resistance. Borla part 11978 fits the 2021-2026 Ford Bronco.

Installation is not included, and any optional Borla part called out in the fit notes is sold separately.

Features

Maximum Borla volume
ATAK is the loudest of Borla's three sound levels, an aggressive, full exhaust note.

ATAK core technology
ATAK stands for Acoustically-Tuned Applied Kinetics. ATAK mufflers hold several solid and perforated cores, and Borla uses computer modeling to adjust their shapes and perforation patterns until the note is right for the vehicle.

Axle-back scope, lower cost
An Axle-Back system replaces the mufflers, rear piping and tips from the rear axle back. It costs less than a full Cat-Back and still gives a distinct Borla note, though with a less full-bodied sound.

Mandrel-bent T-304 stainless steel
Mandrel bends keep the tube round through every curve, and the T-304 austenitic alloy holds up to heat and road salt better than 409 or aluminized steel.

Precise CNC manufacturing
Computer numerical control production keeps each bend and flange accurate to the vehicle the system was built around.

Covered by the Million-Mile Warranty
Materials and workmanship are covered for the original buyer on the original vehicle; finishes and moving parts carry a one-year term.

Fitment & Compatibility

Borla fit notes for this part

Specifications

• Brand: Borla
• Sound level: ATAK
• Warranty: Borla Million-Mile Warranty (one year on carbon fiber, black coatings, tip finishes and moving parts)
• Material: T-304 stainless steel
• System Type: Axle-Back
• Tube Bends: Mandrel-bent
• Pipe Diameter: 2.75" Into Dual 2.5"
• Tip Size: 4"
• Tip Exit: Vehicle Single Split Rear Exit
• Product weight: 28.2 lb
• Part numbers: 11978, 11978CB

Tip finish options

California Proposition 65

WARNING: This product in the physical form it is sold does not present a hazard. However, operations including, but not limited to welding, brazing or thermal cutting can expose you to chemicals including chromium, nickel, cobalt, arsenic, cadmium and lead, which are known to the State of California to cause cancer, birth defects and other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Installation

Type: Axle-Back exhaust system  ·  Install: vehicle-specific; method varies by application  ·  Tools: listed on the Borla install sheet

This system replaces the exhaust from the rear axle back and joins the remaining factory piping. Follow the fit notes below and the Borla install sheet for this vehicle.

Borla's installation instructions for this part number are linked under Resources. Read them fully before starting.

Resources

• Borla ATAK Axle-Back Exhaust System installation instructions (PDF), Borla's step-by-step guide, which covers part 11978.

Warranty, Shipping & Returns

Warranty. Borla covers its products under the Million-Mile Warranty, which protects the original purchaser of record, on the vehicle the part was first installed on, against defects in materials or workmanship for a million miles. Carbon fiber, black coatings, tip finishes and moving parts such as valves and actuators carry a one-year term, and appearance blemishes from weather, road hazards, lack of maintenance or temperature extremes are not covered. When Borla's inspection confirms a defect, Borla repairs or replaces the part at its option. The warranty does not pay for removal or reinstallation, does not apply to parts damaged by accident, abuse, misuse, misapplication or modification, and does not cover sound level, because sound is a matter of taste. Shipping. The carrier and ship method are set by the size and weight of the carton when the order is placed; long exhaust systems ship in oversize cartons. Inspect on delivery. When the carton arrives, open it and check every pipe, muffler, clamp and hanger against the parts list before you start the install, and report any shipping damage right away with photos.

Returns. Unused items in their original packaging can be returned within 30 days of delivery. If an item arrives damaged, defective or wrong, return shipping is on us. See our Returns & Refunds Policy, or email support@prestigetruck.com with any question.

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