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Maximum C7 Aggression, Blacked-Out Xtreme Valve-Back for the LT1 V8
The CORSA 14764BLK is the matte black tip variant of the Xtreme-level valve-back exhaust built for the 2014-2019 Chevrolet Corvette C7 Stingray and Grand Sport with automatic transmission and factory NPP active exhaust valve. It delivers the same maximum-aggressive RSC-tuned Xtreme sound as the polished 14764 but finishes with twin 4.5-inch quad matte black PVD Pro-Series tips for a sinister, blacked-out visual package that suits dark-themed and track-focused C7 builds. The factory NPP valve integration preserves the driver-controlled quiet mode while CORSA's Xtreme tuning delivers maximum sound when needed.
Key Features
- Compatible with factory NPP active exhaust valve on C7 Stingray and Grand Sport auto
- CORSA RSC technology at Xtreme level for maximum C7 LT1 V8 aggression
- 2.75-inch mandrel-bent T304 stainless steel construction
- Twin 4.5-inch quad matte black PVD Pro-Series exhaust tips
- Xtreme sound level: loudest, most aggressive CORSA C7 tuning
- 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 | 14764BLK |
| UPC | 847466012952 |
| Pipe Diameter | 2.75 inches |
| System Type | Valve-Back |
| Sound Level | Xtreme |
| Tip Style | Twin 4.5-inch Quad Matte Black PVD Pro-Series |
| Exit | Dual Rear Exit |
| Material | T304 Stainless Steel |
| Transmission | Automatic (with factory NPP valve) |
| Warranty | Limited Lifetime |
What's Included
- 1x CORSA 14764BLK Xtreme valve-back muffler assembly
- Twin 4.5-inch quad 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 and has engineered Corvette exhaust systems for over 30 years. Every CORSA system uses T304 aircraft-grade stainless steel with a limited lifetime warranty and is assembled in the USA.
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Frequently Asked Questions
What is the CORSA 14764BLK?The CORSA 14764BLK is a 2.75-inch Xtreme valve-back exhaust for the 2014-2019 C7 Corvette Stingray and Grand Sport with automatic transmission and factory NPP valve, featuring twin 4.5-inch quad matte black PVD tips and CORSA RSC technology at its loudest, most aggressive C7 tuning level.
How does the 14764BLK differ from the 14764?Both are Xtreme valve-back systems with identical RSC tuning, 2.75-inch T304 construction, and NPP compatibility. The only difference is tip finish: the 14764 has polished stainless quad tips; the 14764BLK has matte black PVD quad tips.
Is the 14764BLK drone-free at highway speeds?RSC technology manages resonance at the Xtreme level. Highway cabin volume will be higher than Sport tuning, but CORSA's RSC calibration prevents the harshest drone peaks.
Does this work with the factory NPP active valve?Yes. The CORSA 14764BLK installs downstream of the NPP valve, preserving quiet and sport driver-controlled modes while delivering Xtreme sound in the open position.
Is this drone-free?CORSA RSC technology manages resonance at all sound levels including Xtreme. The Xtreme level will have higher highway volume than Sport but avoids severe drone peaks.
Does this fit the C7 Z06 or ZR1?The CORSA 14764BLK is designed for the C7 Stingray and Grand Sport. Z06 and ZR1 have different exhaust routing and require their own specific CORSA fitment.
Do I need a tune?No. The CORSA 14764BLK is a bolt-on replacement with no ECU tune, cutting, or welding required.
What warranty does the 14764BLK carry?CORSA provides a limited lifetime warranty on the 14764BLK 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 muffler section downstream of the NPP valve
- Disconnect and remove the factory muffler and tip assembly
- Test-fit CORSA 14764BLK before tightening any hardware
- Attach to factory hangers and install all supplied hardware
- Torque all connections to specification and verify tip symmetry
- Start engine 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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