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.
What Corvette Owners Say
“It’s loud when you want it, and the valved setup still keeps it livable for normal driving.”
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 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.
