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Xtreme LT1 V8 Sound with Polished Quad Tips for the 2014-2019 C7 Corvette Auto
The CORSA 14764 is a 2.75-inch Xtreme-level valve-back exhaust system for the 2014-2019 Chevrolet Corvette C7 Stingray and Grand Sport with automatic transmissions and the factory NPP active exhaust valve. The Xtreme tuning delivers CORSA's maximum aggressive LT1 V8 sound in open mode, while the factory NPP valve preserves a quiet driving mode when desired. The 14764 exits through twin 4.5-inch polished quad Pro-Series tips for a premium high-gloss stainless finish. Built from 2.75-inch mandrel-bent T304 stainless steel throughout.
Key Features
- Compatible with factory NPP active exhaust valve on C7 Stingray and Grand Sport auto
- CORSA RSC technology at Xtreme level for maximum LT1 V8 aggression
- 2.75-inch mandrel-bent T304 stainless steel construction
- Twin 4.5-inch polished quad Pro-Series exhaust tips
- Xtreme sound level: CORSA's most aggressive LT1 V8 sound signature
- 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 | 14764 |
| UPC | 847466012945 |
| Pipe Diameter | 2.75 inches |
| System Type | Valve-Back |
| Sound Level | Xtreme |
| Tip Style | Twin 4.5-inch Polished Quad Pro-Series |
| Exit | Dual Rear Exit |
| Material | T304 Stainless Steel |
| Transmission | Automatic (with factory NPP valve) |
| Warranty | Limited Lifetime |
What's Included
- 1x CORSA 14764 Xtreme valve-back muffler assembly
- Twin 4.5-inch polished quad 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 14764?The CORSA 14764 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, delivering CORSA's maximum aggressive LT1 V8 sound through twin 4.5-inch polished quad Pro-Series tips.
Does the 14764 work with the factory NPP active exhaust valve?Yes. The CORSA 14764 installs downstream of the factory NPP valve. It preserves the driver-controlled quiet and sport modes while adding CORSA's Xtreme RSC sound in the open mode.
How does the 14764 Xtreme level compare to the 14762 Sport level?The CORSA 14764 Xtreme is substantially louder and more aggressive than the 14762 Sport. Sport delivers a refined European-character exhaust; Xtreme delivers CORSA's maximum aggressive LT1 V8 sound for enthusiasts who want the most dramatic change from stock.
Is the 14764 drone-free at highway speeds?RSC technology manages resonance at the Xtreme level. Highway cabin volume will be higher than Sport tuning, but the worst drone peaks are controlled by RSC calibration.
Does this fit the Z06 or ZR1?The CORSA 14764 is designed for the C7 Stingray and Grand Sport. Z06 and ZR1 use different exhaust configurations and require their own CORSA-specific fitments.
Does this require a tune?No. The CORSA 14764 is a bolt-on valve-back replacement. No ECU tune, cutting, or welding is required.
What is the difference between 14764 and 14764BLK?Both are the same Xtreme valve-back for the same C7 platform. The 14764 has polished stainless quad tips; the 14764BLK has matte black PVD quad tips.
What warranty does the 14764 carry?CORSA provides a limited lifetime warranty on the 14764 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 the factory muffler and tip assembly
- Remove the factory muffler assembly
- Test-fit CORSA 14764 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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