C7 Corvette Grand Sport Borla ATAK 11863 with Standard Exhaust (2017-2019)

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.

What Corvette Owners Say

“Exactly the kind of aggressive sound I wanted—loud when I’m on it, but still clean at cruise.”

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.