C7 Corvette Grand Sport CORSA Xtreme Axle-Back Exhaust 14766 (Manual Only)
The CORSA Xtreme Axle-Back Exhaust System 14766 is engineered specifically for 2017–2019 C7 Corvette Grand Sport models with a manual transmission. This system delivers CORSA’s most aggressive Xtreme sound profile while using patented Reflective Sound Cancellation® (RSC®) technology to help control interior drone at steady cruising speeds.
Transmission-specific fitment is critical: this exhaust fits manual transmission Grand Sport models only. It will not fit automatic Grand Sport Corvettes.
Valve compatibility note: 14766 as a non-NPP system. It will also physically fit Grand Sport models originally equipped with NPP, but installing this system eliminates factory sound-mode functionality. Valve actuators can be retained (“hung”) to maintain ECU compliance.
Why CORSA 14766 is a top Grand Sport exhaust choice
- Xtreme Sound Level: CORSA’s loudest, most aggressive tone
- RSC® No-Drone Technology: tuned to reduce cabin resonance
- 2.75" axle-back design: improved exhaust flow and throttle response
- Quad 4.5" polished Pro-Series tips: dual-wall, slash-cut finish
- 304 stainless steel construction: corrosion-resistant and durable
- Direct bolt-on installation: no cutting or welding required
What to Expect After Installation
- Noticeably louder, race-inspired exhaust note under throttle
- Crisp, sharp CORSA tone rather than a muddy muscle-car rumble
- Strong presence at idle and wide-open throttle
- If installed on an NPP car: sound modes are removed for a consistent exhaust tone
Technical Specifications
- CORSA Part Number: 14766
- System Type: Axle-Back
- Pipe Diameter: 2.75"
- Exit Style: Dual rear exit
- Tip Configuration: Quad tips (twin per side)
- Tip Size: 4.5"
- Tip Finish: Polished
- Sound Level: Xtreme
- Material: 304 stainless steel
- Drone Control: CORSA RSC® technology
Installation Overview
- Direct bolt-on axle-back installation
- Uses factory mounting points
- Basic hand tools recommended
- Estimated install time: 1–2 hours
- Professional installation optional for perfect tip alignment
Corvette Compatibility
- C7 Corvette Grand Sport: 2017, 2018, 2019
- Transmission: Manual ONLY
- Factory Valves: Non-NPP system; fits NPP cars but deletes sound-mode function
Cross-Compatibility & Fitment Notes
- Will NOT fit automatic-transmission Grand Sport models
- Shares exhaust architecture with Z06 manual platform
- Owners wanting quiet/loud mode control should select an NPP-retaining system
What Corvette Owners Say
“Absolutely brutal sound when you get on it, but still livable on the highway. Exactly what I wanted for my manual GS.”
Since 2007, Custom Corvette Accessories has helped Corvette owners choose the correct parts the first time — with fast shipping and real enthusiast support.
Fast nationwide shipping on in-stock items. If you want maximum volume and true CORSA Xtreme sound on your manual Grand Sport, the 14766 is the answer.
✅ In-stock items ship within 24–48 hours via Standard Ground.
✅ Free shipping items are available in the Continental US only.
✅ Custom quotes available for 2-Day, Next Day, or Saturday delivery.
✅ Custom or backordered items ship as soon as available.
