Borla 140839 ATAK Cat-Back Exhaust for the 2027 C8 Corvette Grand Sport, the Aggressive End of the Borla Range
ATAK is the aggressive end of the Borla range, and a naturally aspirated 6.7-liter V8 is the kind of engine people put it on. The Borla ATAK 140839 is a cat-back exhaust for the 2027 C8 Corvette Grand Sport and its 6.7L LS6 V8, running 3-inch main piping in T-304 stainless steel out to a dual split rear exit. So how far up does ATAK actually take it?
The 140839 replaces the exhaust from the catalytic converters back, which is more of the car than an axle-back touches, and it moves the gas out through 3-inch piping in place of the factory routing. ATAK is Borla's aggressive sound level, built for the owner who wants the LS6 heard from outside the car and not only through the cabin. The quiet setting does not go away, because the AFM/DFM and NPP valves ship with the system, so the car still has it for early mornings and long highway miles.
Borla 140839 Product Details
- Brand: Borla
- Part number: 140839
- System type: Cat-Back
- Sound level: ATAK, the aggressive end of the Borla range
- Fits: C8 Corvette Grand Sport, 6.7L LS6
- Main piping: 3-inch, with 2-inch and 2.75-inch sections
- Material: T-304 stainless steel construction
- Tips: Quad, two each side, 4-inch round bright chrome
- Exit style: Dual split rear exit
- Valves: AFM/DFM valves and NPP valves included
- Shipping: Two boxes
- Warranty: Borla Million Mile Warranty
Benefits
- A hard-edged exhaust note on a naturally aspirated 6.7-liter V8
- Cat-back coverage: everything from the catalytic converters back, not only the section behind the axle
- Factory valve behavior kept intact, so aggressive does not mean loud all the time
- Quad 4-inch bright chrome tips across the wide-body rear
What to Expect After Installation
Expect a harder-edged, more aggressive tone than stock at throttle, with the valves still doing their job when you close it. There is no published decibel figure for this system and we do not estimate one. Sound is the reason this system exists and it is also the one thing you cannot audition before you buy, so call us if you want to talk it through before you order. If a warning light shows up after the install, that is the valve relearn talking, and it is covered below.
Important Exhaust Notes
- This fits the Grand Sport built with the factory NPP valved performance exhaust. Do not install it on a car without O.E. NPP.
- Valve actuator recalibration is required after installation, per GM Document ID 5406413, and a Chevrolet dealer is the recommended place to have it done. Budget the time before you book the install.
CORVETTE COMPATIBILITY
- Generation: C8
- Model: 2027 Chevrolet Corvette Grand Sport
- Model Years: 2027
- Engine: 6.7L LS6 V8
- Body Styles: Coupe and convertible
- Required Equipment: The factory NPP valved performance exhaust with outboard exhaust outlets
Why Buy This Borla ATAK 140839 From Custom Corvette Accessories?
Custom Corvette Accessories is enthusiast owned and operated, so we confirm the fitment before the order goes out. Tell us your model year and trim, or send the VIN, and we will check which factory exhaust your Grand Sport was built with, the outboard NPP outlets or the quad center-exit option, because that is what decides whether this system bolts to your car. Borla 140839 is the ATAK cat-back in T-304 stainless with quad 4-inch bright chrome tips and the AFM/DFM and NPP valves included, built for the 2027 C8 Corvette Grand Sport, and Free Shipping in the USA.
✅ 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.
