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The Corsa Performance COR21039BLK Sport Axle-Back Exhaust is engineered for 2018-2020 Ford Mustang GT and Bullitt owners who want maximum presence without a full cat-back investment. Using Corsa's patented RSC Technology, the COR21039BLK eliminates cabin drone at cruising speeds while delivering a deep, aggressive 5.0L Coyote V8 tone at wide-open throttle. The 3-inch mandrel-bent T304 stainless steel construction is built to last, and the 4-inch black PVD Pro-Series tips add a factory-aggressive, blacked-out finishing touch. Installation is a clean bolt-on with no cutting, welding, or tuning required.
Key Features
- 3-inch mandrel-bent T304 stainless steel piping.
- Bolt-on Sport axle-back installation with no modifications required.
- 4-inch Black PVD Pro-Series exhaust tips.
- Safely raise the Mustang on a lift or with jack stands and allow the exhaust to cool.
- Hang the Corsa muffler assembly onto the OEM hanger locations.
- Start the engine and check for exhaust leaks before driving.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2018-2020 | Ford | Mustang | GT |
| 2018-2020 | Ford | Mustang | GT Premium |
| 2020 | Ford | Mustang | Bullitt |
Specifications
| Manufacturer | CORSA Performance |
|---|---|
| Manufacturer Part Number | 21039BLK |
| Product Type | Axle Back |
| Fitment Type | Vehicle specific |
| Finish | Black PVD |
| Tip Size | 4.0 inch Black PVD Pro-Series |
| Pipe Diameter | 3.0 inch |
| Material | T304 Stainless Steel |
| System Type | Sport Axle-Back |
| Fitment | 2018-2020 Ford Mustang GT 5.0L V8 |
| Prop 65 | Yes |
| Warranty | Limited Lifetime |
| Made In | USA |
What's Included
- Sport axle-back muffler assembly
- 4-inch Black PVD Pro-Series exhaust tips
- OEM-style hangers and clamps
- Corsa installation instructions
About CORSA Performance
CORSA Performance develops vehicle-specific and universal intake and exhaust components with an emphasis on application-specific engineering, durable materials, controlled sound, and precise fit. Product configuration and installation requirements remain exact-part-number specific.
Related CORSA Performance Products
- Corsa 18-19 Ford Mustang 5.0L V8 3in Sport Cat-Back Dual Rear Exit w/ 4in Black PVD Pro-Series Tips
- Corsa 2024+ Ford Mustang V8 5.0L 3in Axle-Back Exhaust System w/ Twin 4in Black Pro-Series Tips
- Corsa 2024 Ford Mustang GT Sport Axle-Back Dual Rear Exit with 4.5in Black PVD Pro-Series Tips
Browse the CORSA Performance collection for related exhaust, intake, and engine-bay upgrades.
Frequently Asked Questions
Will this CORSA product fit my 2018-2020 Ford Mustang?
That vehicle range is listed, but confirm the exact manufacturer part number, trim, cab or body style, factory exhaust or intake configuration, and every application note before ordering.
How should I choose the correct CORSA exhaust configuration?
Compare sound level, pipe diameter, exit location, tip finish, factory valve or active-exhaust requirements, cab and bed or body configuration, and the exact part number.
Does this CORSA exhaust require professional installation?
Vehicle-specific systems are generally bolt-on when the exact application matches. Universal components can require cutting and welding. Professional installation helps ensure alignment, clearance, sealing, and correct clamp torque.
Installation Instructions
Follow CORSA and vehicle service instructions. Allow the exhaust to cool, support the vehicle safely, confirm the factory connection and hangers, align the tips before final tightening, check for leaks, and recheck clamp torque after the first heat cycle.
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