C7 Corvette Grand Sport CORSA 14776 NPP Axle-Back Exhaust
Upgrade your 2017–2019 C7 Corvette Grand Sport (Automatic) with the CORSA 14776 NPP axle-back exhaust system, engineered to retain full factory valve functionality while delivering a wide, controllable sound range with zero drone.
Constructed from premium 304 stainless steel, the CORSA 14776 features a straight-through, high-flow design paired with 4.5" quad polished Pro-Series tips for a clean, aggressive OEM+ appearance. CORSA’s patented Reflective Sound Cancellation® (RSC®) technology targets unwanted frequencies, allowing aggressive tone under throttle without intrusive cabin resonance.
With the factory NPP valves retained, this system provides a noticeable sound difference between driving modes — refined and controlled during cruising, and authoritative under heavy acceleration — all while maintaining daily drivability.
Why choose CORSA 14776 for your Grand Sport
- Factory NPP valve retention for adjustable sound control
- Variable tone from Sport to Xtreme based on drive mode
- RSC® technology eliminates highway drone
- 304 stainless steel construction for long-term durability
- 4.5" quad polished tips for a factory-plus appearance
What to expect after installation
- Noticeably stronger exhaust presence without harshness
- Clear sound separation between drive modes
- No cutting or welding — direct bolt-on installation
- Preserved daily comfort with aggressive capability on demand
- Made in the USA with a lifetime warranty (5 years on valves)
Fitment & compatibility (read carefully)
- C7 Corvette Grand Sport: 2017, 2018, 2019
- Automatic transmission ONLY
- Factory NPP exhaust REQUIRED
- Will NOT fit non-NPP vehicles
“The sound difference between modes is exactly what I wanted. Calm when cruising, aggressive when pushed — and zero drone.” – Laura P.
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Vehicle Fitment & Specifications
| Generation: | C7 |
| Model Years: | 2017 - 2019 |
| Trim Level: | Grand Sport |
| Engine Code: | LT1 |
| Transmission Type: | Manual, Automatic |
| Intended Use: | Street |
Installation Instructions
Download PDF Installation InstructionsShipping Information
| Item Weight: | 53.9 lbs |
| Boxed Weight: | 59.2 lbs |
| Box Size: | 56.7 x 20.9 x 13.8 |