C7 Corvette Grand Sport CORSA Xtreme NPP Axle-Back Exhaust 14777BLK – Black Tips (2017–2019)
The CORSA Xtreme 14777BLK is a valved axle-back exhaust system engineered specifically for 2017–2019 C7 Corvette Grand Sport models equipped with factory NPP and a manual transmission. It delivers aggressive Xtreme sound when the valves are open while retaining controlled cruising volume through OEM NPP valve operation — all without interior drone.
Product Overview
- CORSA Part Number: 14777BLK
- System Type: Axle-back exhaust
- Sound Level: CORSA Xtreme
- Valves: Retains factory NPP valves
- Tips: Quad 4.5" Black Pro-Series
- Material: 304 stainless steel
- Made in: USA
Why Choose CORSA Xtreme with NPP
This system combines CORSA’s patented Reflective Sound Cancellation® (RSC®) technology with factory NPP valve control. Touring mode provides reduced exhaust volume for street driving, while Sport and Track modes open the valves to deliver a sharp, race-inspired exhaust tone without cabin resonance.
Key Benefits
- Dual-mode sound control: Quiet cruising or aggressive performance
- Xtreme volume: CORSA’s loudest exhaust profile when valves are open
- No drone cruising: RSC® technology targets interior resonance
- OEM integration: Full compatibility with factory NPP operation
- Black Pro-Series tips: Stealth, aggressive appearance
Performance & Construction
- Straight-through axle-back design improves exhaust flow
- Precision TIG-welded 304 stainless steel construction
- Weight reduction versus factory exhaust components
- Lifetime warranty on exhaust system (5 years on valves)
Installation Overview
- Install Type: Direct bolt-on axle-back
- Cutting/Welding: Not required
- Estimated Install Time: 1–2 hours
- Note: Professional installation recommended
Corvette Compatibility
- Fits: C7 Corvette Grand Sport (2017–2019)
- Transmission: Manual only
- Required: Factory NPP-equipped vehicles
- Will NOT Fit: Automatic transmission or non-NPP models
What Corvette Owners Say
“The CORSA Xtreme 14777BLK gives my Grand Sport a brutal Track-mode sound, but still cruises quietly on the highway.”
Upgrade your Grand Sport with CORSA Xtreme 14777BLK and experience true valved performance.
✅ 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.
