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This Borla axle-back exhaust system is built for the verified 2018-2021 Ford Mustang GT application listed below. Select it by exact manufacturer part number 11951 and confirm the full engine, drivetrain, body, wheelbase, factory-exhaust, and Borla application notes before ordering.
Key Features
- T-304 Stainless Steel Construction: Ensures durability and resistance to corrosion with premium material superior to common alternatives.
- 2.5-Inch Mandrel-Bent Tubing: Allows smooth exhaust flow for power and torque increases through patented straight-through design.
- Dual 4-Inch Bright Chrome Tips: Adds motorsport styling with split rear exit on T-304 stainless steel for a bold appearance.
- S-Type Sound: Provides an aggressive, race-inspired exhaust note controlled by factory active valves for street or track driving.
- Multi-Core Technology: Boosts exhaust velocity, enhances throttle response, and delivers a heart-pounding soundtrack with every shift.
- Fits only models with factory active exhaust valves; retains valve functionality for adjustable sound levels.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2018-2021 | Ford | Mustang | GT |
| 2018-2021 | Ford | Mustang | GT Premium |
| 2019-2020 | Ford | Mustang | Bullitt |
| 2021 | Ford | Mustang | Mach 1 |
Specifications
| Manufacturer | Borla |
|---|---|
| Manufacturer Part Number | 11951 |
| Product Type | Axle Back |
| Sound Profile | S-Type |
| Inlet or Outlet Size | 2.5in |
| Position | Rear |
| Fitment Type | Vehicle specific, verify the complete application |
What's Included
One new Borla product identified by manufacturer part number 11951. Clamps, hangers, gaskets, tips, pipes, tools, and companion parts are included only when expressly listed for this exact part number.
About Borla
Borla develops stainless-steel exhaust systems, mufflers, tips, pipes, and related components for vehicle-specific and universal performance applications. Product selection remains exact-application and exact-part-number specific.
Related Borla Products
- Borla 2018 Ford Mustang GT 5.0L AT/MT 2.5in S-Type Exhaust w/o Valves (Rear Section Only)
- Borla 18-19 Ford Mustang GT 5.0L 2.5in S-Type Exhaust w/o Valves (Rear Section Only) - Black Chrome
- Borla 18-19 Ford Mustang GT 5.0L AT/MT 2.5in S-Type Axle Back Exhaust w/ Valves - Black Chrome Tips
Browse the Borla collection for related exhaust systems and components.
Frequently Asked Questions
Will this Borla part fit my 2018-2021 Ford Mustang GT?
That application is listed, but confirm the engine, drivetrain, body or cab style, wheelbase, factory exhaust layout, tip opening, and every Borla application note before ordering.
Will this change require an engine tune?
A cat-back, axle-back, tip, muffler, or post-catalyst component usually does not require tuning, but confirm the exact application, emissions configuration, oxygen-sensor locations, and local requirements before installation.
What should I inspect before installation?
Check the shipping carton and components against the exact part number, then inspect clamps, hangers, gaskets, mating flanges, clearances, tip alignment, and required reused factory hardware before removing the original exhaust.
Installation Instructions
Follow the current Borla instructions and vehicle service information for this exact part number. Let the exhaust cool, support the vehicle safely, compare all parts before removal, protect sensors and wiring, use the specified clamps and torque values, align all joints and tips without preload, confirm body and suspension clearance, check for leaks, and retorque after the first heat cycles. Professional installation is recommended.
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