C7 Corvette Grand Sport Borla ATAK Axle-Back Exhaust 11863 (2017-2019)
Borla designed the ATAK 11863 axle-back for C7 Grand Sport owners running the standard (non-NPP) exhaust who want the most aggressive Borla sound profile with a clean, centered quad-exit look. This setup delivers a sharper ATAK edge when you get into the throttle, while keeping cruising comfortable with a no-drone sound character.
Borla 11863 Product Details
- System type: Axle-Back
- Sound level: ATAK (most aggressive Borla sound profile)
- Fitment focus: C7 Grand Sport WITHOUT NPP (standard exhaust)
- Years: 2017–2019
- Engine: LT1 (6.2L)
- Transmission: Grand Sport Automatic
- Valves: AFM valves included; NPP valves not included
- Pipe diameter: Single 2.75" into muffler, dual 2" out
- Tip style/finish: Dual 4.25" round polished intercooled T-304 stainless tips on each muffler
- Tip exit: Quad center rear exit
- Construction: Premium T-304 stainless steel
- Upgrade path: Add Borla X-Pipe 60548 to create a Cat-Back system
- Warranty: Million-Mile Warranty (non-moving parts); exhaust valves covered for 1 year
Why C7 Grand Sport Owners Choose Borla ATAK 11863
- Maximum sound upgrade for standard (non-NPP) Grand Sport builds
- ATAK sound profile with a no-drone cruising character
- Quad center-exit look with 4.25" polished intercooled tips
- Easy upgrade path to a full cat-back later with X-Pipe 60548
What to Expect After Installation
- More presence at throttle with a sharper ATAK edge
- A cleaner, more aggressive note than stock without a boomy cabin tone
- Stronger rear appearance with quad center-exit polished tips
Corvette Compatibility
- C7 Corvette Grand Sport (LT1) WITHOUT NPP: 2017, 2018, 2019
- Fits: Grand Sport Automatic Transmission
- Not compatible: C7 Grand Sport Manual Transmission
Important install note: This axle-back includes AFM valves and does not include NPP valves, making it a match for standard (non-NPP) exhaust cars (or cars where NPP is disabled). Million-Mile coverage applies to non-moving parts; exhaust valves are covered for 1 year.
FREE SHIPPING in the USA (where applicable). Order the Borla ATAK 11863 today and give your 2017–2019 C7 Grand Sport (Automatic, non-NPP) an aggressive ATAK personality with quad center-exit 4.25" polished intercooled tips.
✅ 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.
