Borla ATAK Axle-Back Exhaust for C7 Corvette Grand Sport Automatic with NPP (11856)
Borla designed the ATAK 11856 for C7 Grand Sport owners who want an aggressive ATAK sound while keeping full NPP dual-mode control. This axle-back includes AFM and NPP valves, exits through a quad center rear layout, and delivers the ATAK character with no drone inside the vehicle.
Borla 11856 Product Details
- System type: Axle-Back
- Sound level: ATAK (most aggressive Borla sound level)
- Fitment focus: C7 Grand Sport Automatic with NPP (dual-mode exhaust)
- Years: 2017–2019
- Engine: LT1 (6.2L)
- Valves: Includes AFM and NPP valves
- Pipe diameter: Single 2.75" into muffler, dual 2.75" out
- Tip style/finish: Dual 4.25" round polished intercooled T-304 stainless tips on each muffler
- Tip exit: Quad center rear exit
- Construction: T-304 stainless steel
- Upgrade path: Add Borla X-Pipe 60548 to create a Cat-Back system
- Warranty: Borla Million Mile Warranty
Why C7 Grand Sport Owners Choose Borla ATAK 11856
- ATAK sound level with factory NPP dual-mode adjustability
- Quad center-exit look with polished intercooled tips
- Free-flowing 2.75" design for a stronger, sharper tone
- Easy upgrade path to a full cat-back later with X-Pipe 60548
What to Expect After Installation
- A louder, sharper exhaust note than stock with a true ATAK edge
- NPP control retained for “quiet vs loud” driving modes
- A clean, aggressive rear appearance with quad center-exit polished tips
Corvette Compatibility
- Fits C7 Corvette Grand Sport (LT1) Automatic with NPP: 2017, 2018, 2019
- Not compatible: C7 Grand Sport with a manual transmission
Important: C7 Corvette Axle-Back systems are covered under Borla’s Million Mile Warranty for non-moving parts. Exhaust valves are warrantied for 1 year. Failures of original equipment AFM and NPP actuators are not covered.
What Corvette Owners Say
“The ATAK tone is exactly what I wanted, and the quad center exit looks perfect on the Grand Sport.”
FREE SHIPPING in the USA (where applicable). Order the Borla ATAK 11856 today and give your 2017–2019 C7 Grand Sport (Auto, NPP) an aggressive ATAK sound with quad center-exit 4.25" polished intercooled tips.
✅ 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.
