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Xtreme RSC Sound Designed Around the C7 Corvette NPP Active Exhaust Valve
The CORSA 14776 is a 2.75-inch Xtreme valve-back exhaust system built for the 2014-2019 Chevrolet Corvette C7 Stingray and 2017-2019 Grand Sport in automatic transmission configurations equipped with the factory NPP active exhaust valve. CORSA engineers the 14776's RSC technology to integrate with the NPP valve's open and closed modes, delivering Xtreme-level sound in open mode and a refined Sport character in closed mode through quad 4.5-inch polished Pro-Series tips.
Key Features
- CORSA RSC technology engineered around the factory NPP active exhaust valve
- 2.75-inch mandrel-bent T304 stainless steel construction
- Quad 4.5-inch polished Pro-Series exhaust tips
- Xtreme open-mode sound plus refined closed-mode character
- Fits 2014-2019 C7 Stingray and 2017-2019 Grand Sport automatic with factory NPP
- CORSA limited lifetime warranty
- Made in Berea, Ohio, USA
Vehicle Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2014-2019 | Chevrolet | Corvette | Stingray |
| 2017-2019 | Chevrolet | Corvette | Grand Sport |
Specifications
| Detail | Value |
|---|---|
| MPN | 14776 |
| UPC | 847466012860 |
| Pipe Diameter | 2.75 inches |
| System Type | Valve-Back (NPP) |
| Sound Level | Xtreme (open) / Sport (closed) |
| Tip Style | Quad 4.5-inch Polished Pro-Series |
| Exit | Quad Rear Exit |
| Material | T304 Stainless Steel |
| Transmission | Automatic with factory NPP valve |
| Warranty | Limited Lifetime |
What's Included
- 1x CORSA 14776 Xtreme valve-back muffler assembly
- Quad 4.5-inch polished 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 14776 was among the first exhaust systems to integrate RSC technology with the factory NPP valve system, letting drivers control exhaust character through the C7's driving modes while staying completely drone-free. Every system is assembled in the USA from T304 stainless steel.
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Frequently Asked Questions
What is the CORSA 14776?The CORSA 14776 is a 2.75-inch Xtreme valve-back exhaust for the 2014-2019 C7 Corvette Stingray and 2017-2019 Grand Sport automatic with factory NPP, engineered to work with the NPP active valve and delivering Xtreme sound in open mode and refined character in closed mode through quad polished 4.5-inch tips.
Does the 14776 work with the factory NPP driving modes?Yes. The CORSA 14776 is specifically engineered to function with the factory NPP valve. Tour mode keeps the valve closed for quieter operation; Sport and Track modes open the valve for full Xtreme output.
Is the 14776 drone-free?Yes. RSC technology eliminates the standing-wave resonance responsible for highway drone in both open and closed NPP valve modes.
What is the difference between 14776 and 14776BLK?Both are the same Xtreme NPP valve-back for the same platform. The 14776 uses polished stainless quad tips; the 14776BLK uses matte black PVD quad tips. Sound and fitment are identical.
Does the 14776 fit manual transmission C7 Corvettes?No. The CORSA 14776 is for automatic C7 Corvettes with factory NPP. Manual-trans owners should look at the 14764 valve-back or the 14766 and 14768 axle-backs.
Does installation require cutting or welding?No. The CORSA 14776 is a direct bolt-on replacement using factory mounting points. No cutting or welding required.
Is a tune required after installation?No. The 14776 retains factory catalytic converters and does not affect engine management. No tune is required.
What warranty does the 14776 carry?CORSA provides a limited lifetime warranty on the 14776 against defects in materials and workmanship when purchased from an authorized dealer.
Installation Instructions
- Safely raise and support the Corvette on rated jack stands or a lift
- Allow the factory exhaust to cool completely
- Locate the factory NPP valve and identify the valve-back section
- Disconnect the factory muffler assembly at the NPP valve outlet
- Test-fit CORSA 14776 before tightening any hardware
- Attach to factory hangers and NPP valve outlet and install all supplied hardware
- Torque all connections to specification and verify 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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