Borla ATAK Axle-Back Exhaust for C7 Corvette Grand Sport Manual with NPP (11903)
If you want the most aggressive Borla sound for a 2017–2019 C7 Corvette Grand Sport while keeping the factory NPP valved exhaust behavior, the Borla ATAK 11903 is the axle-back built for that job. Fitment for Manual Transmission ONLY, and the rear view is finished with quad 4.25" polished intercooled tips for a clean, high-contrast OEM+ look.
Borla 11903 Product Details
- System type: Axle-Back (valved)
- Sound level: ATAK (maximum volume, sharp and aggressive)
- Fitment focus: C7 Grand Sport (LT1) Manual Transmission ONLY with factory NPP valves
- Pipe diameter: 2.75"
- Valves: Equipped with NPP valves and does NOT have AFM valves
- Tips: Quad 4.25" round rolled, angle-cut polished intercooled T-304 stainless tips
- Exit: Quad center rear exit
- Material: T-304 stainless steel
- Cabin comfort: Tuned for an aggressive ATAK sound while staying enjoyable at cruise
- Install: Bolt-on using factory-style valve connections (professional install recommended)
- Warranty: Million-Mile Warranty for non-moving parts; exhaust valves warrantied for 1 year
Why Grand Sport Owners Choose the Borla ATAK 11903
- Maximum presence: ATAK is for drivers who want a louder, sharper exhaust personality
- Valved control kept: retains the NPP valved setup for real-world flexibility
- Stronger rear appearance: quad polished tips fill the opening with an aggressive, premium finish
- Built for long-term use: T-304 stainless construction for corrosion resistance
What to Expect After Installation
- More bite under throttle: a sharper, more intense sound when you roll into it
- More character everywhere: a big change from stock even in normal street driving
- Quad center-exit look: visual upgrade that matches the Grand Sport’s widebody stance
Corvette Compatibility
- Fits 2017–2019 Chevrolet Corvette C7 Grand Sport (6.2L LT1) with factory NPP valves — Manual Transmission ONLY.
- Will NOT fit C7 Grand Sport with Automatic Transmission.
Ready to upgrade? Order the Borla ATAK 11903 today and give your Grand Sport a louder, sharper sound with quad polished tips to match.
✅ In-stock items ship in 1–2 business days 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.
