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Blacked-Out Xtreme NPP Sound for the Sixth-Gen Camaro SS and ZL1
The CORSA 14789BLK is the matte black tip variant of the Xtreme valved axle-back exhaust for the 2016-2021 Chevrolet Camaro SS 6.2L and 2017-2021 ZL1 6.2L with factory NPP active exhaust valve. It delivers the same RSC-engineered Xtreme-open and Sport-closed NPP performance as the polished 14789, exiting through quad 4.0-inch matte black PVD Pro-Series tips for a stealthy exterior appearance. Drone-free at highway speeds in both NPP modes.
Key Features
- CORSA RSC technology at Xtreme level engineered around the factory NPP active valve
- 2.75-inch mandrel-bent T304 stainless steel construction
- Quad 4.0-inch matte black PVD Pro-Series exhaust tips
- Xtreme open-mode sound plus refined closed-mode character via NPP valve
- Fits 2016-2021 Camaro SS and 2017-2021 ZL1 with factory NPP valve
- CORSA limited lifetime warranty
- Made in Berea, Ohio, USA
Vehicle Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2016-2021 | Chevrolet | Camaro | SS |
| 2017-2021 | Chevrolet | Camaro | ZL1 |
Specifications
| Detail | Value |
|---|---|
| MPN | 14789BLK |
| UPC | 847466015281 |
| Pipe Diameter | 2.75 inches |
| System Type | Valved Axle-Back (NPP) |
| Sound Level | Xtreme (open) / Sport (closed) |
| Tip Style | Quad 4.0-inch Matte Black PVD Pro-Series |
| Exit | Quad Rear Exit |
| Material | T304 Stainless Steel |
| Warranty | Limited Lifetime |
What's Included
- 1x CORSA 14789BLK Xtreme valved axle-back muffler assembly
- Quad 4.0-inch matte black PVD Pro-Series exhaust tips
- All hardware and clamps for bolt-on installation
About CORSA Performance
Founded in 1989 in Berea, Ohio, CORSA Performance invented Reflective Sound Cancellation technology. The 14789BLK delivers the same NPP-integrated Xtreme performance as the polished 14789 with a blacked-out finish suited to dark exterior packages and aftermarket wheels. Every system is assembled in the USA with T304 stainless steel and a limited lifetime warranty.
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Frequently Asked Questions
What is the CORSA 14789BLK?The CORSA 14789BLK is a 2.75-inch Xtreme valved axle-back exhaust for the 2016-2021 Camaro SS and 2017-2021 ZL1 with factory NPP valve, delivering Xtreme sound in open NPP mode and refined character in closed mode through quad matte black PVD 4.0-inch tips with RSC technology.
How does the 14789BLK differ from the 14789?Both are the same Xtreme NPP valved axle-back with identical fitment and sound. The 14789 uses polished stainless quad tips; the 14789BLK uses matte black PVD quad tips.
Does the 14789BLK work with the factory NPP driving modes?Yes. Tour and Comfort modes keep the NPP valve closed for quieter operation; Sport and Track modes open it for full Xtreme output. RSC keeps it drone-free in both states.
Is the 14789BLK drone-free?Yes. RSC technology eliminates highway drone in both NPP open and closed valve states.
Does this fit Camaro SS and ZL1 without the NPP valve?No. The CORSA 14789BLK requires the factory NPP valve. Non-NPP SS and ZL1 owners should look at the 14784BLK or 14786BLK axle-backs.
Does installation require cutting or welding?No. The CORSA 14789BLK is a direct bolt-on at factory mounting points. No cutting or welding required.
Is a tune required?No. The 14789BLK retains factory catalytic converters and does not alter engine management.
What warranty does the 14789BLK carry?CORSA provides a limited lifetime warranty on the 14789BLK against defects in materials and workmanship when purchased from an authorized dealer.
Installation Instructions
- Safely raise and support the Camaro on rated jack stands or a lift
- Allow the factory exhaust to cool completely
- Locate the factory NPP valve assembly
- Disconnect the factory muffler at the NPP valve outlet
- Test-fit CORSA 14789BLK before tightening any hardware
- Attach to factory hangers and NPP valve outlet with all supplied hardware
- Torque all connections to specification and verify quad tip alignment
- Start engine, cycle NPP modes, and inspect all connections for leaks
Prop 65 Warning: This product can expose you to chemicals including nickel compounds, which are known to the State of California to cause cancer, and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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