2027 C8 Corvette Grand Sport Borla ATAK 140839CF Cat-Back Exhaust
The Borla ATAK 140839CF puts Borla's aggressive sound level behind the 6.7L LS6 V8 in the 2027 C8 Corvette Grand Sport and finishes the factory outboard exhaust layout with four 4-inch carbon-fiber tips with bright centers. This cat-back is built for Grand Sports equipped with factory NPP and replaces the exhaust behind the catalytic converters with T-304 stainless steel, 3-inch main piping, SwitchFire® technology and Borla's Polyphonic Harmonizer.
The CF version gives you the ATAK system with carbon-fiber tips rather than the bright stainless tips or the black chrome tips. If you want the same carbon-fiber appearance with a less aggressive Borla sound level, 140838CF is the S-Type alternative. That makes the choice straightforward: ATAK determines the sound character, while the CF suffix determines the tip finish.
Borla 140839CF Product Details
- Brand: Borla
- Part Number: 140839CF
- System Type: Cat-Back
- Sound Level: ATAK
- Engine: 6.7L LS6 V8
- Tips: Quad 4-inch round carbon-fiber tips with bright centers
- Exit Style: Dual split rear exit
- Main Piping: 3-inch, with 2-inch and 2.75-inch sections
- Material: T-304 stainless steel
- Valves: AFM/DFM exhaust valves and NPP valves included
- Technology: SwitchFire® and Polyphonic Harmonizer
- Heat Management: Heat shielding included
- Shipping: Ships in two boxes
- Warranty: Borla Million Mile Warranty
Benefits
- ATAK gives the naturally aspirated LS6 a more aggressive exhaust character than Borla's S-Type system.
- Quad 4-inch carbon-fiber tips with bright centers give the outboard exhaust a distinct finish from the bright stainless and black chrome ATAK versions.
- SwitchFire® changes how the exhaust pulses merge, while the Polyphonic Harmonizer adds multiple tuned frequencies to the exhaust note.
- The system retains factory NPP operation once the valve actuators are properly installed and recalibrated.
- T-304 stainless steel construction and included heat shielding are designed for the tightly packaged C8 exhaust area.
- The complete cat-back replaces the exhaust from the catalytic-converter outlets rearward.
What to Expect After Installation
ATAK is the more aggressive choice in Borla's Grand Sport lineup, with more exhaust presence under acceleration than the S-Type version while retaining the active NPP system. Borla does not publish a decibel figure for 140839CF, so we do not assign one. If your priority is maximum Borla character from the LS6 while still keeping the factory valved exhaust operation, this is the carbon-fiber-tip version built for that job.
The four carbon-fiber tips also change the rear appearance without changing the exhaust layout itself. The dark outer tips contrast with the bright centers at each outlet, while the system remains in the Grand Sport's factory-style outboard position. After installation, the valve actuators must be recalibrated before the active exhaust setup is considered complete.
Important Exhaust Notes
- Factory NPP is required. Borla 140839CF is built for the 2027 Grand Sport with the factory valved performance exhaust and outboard rear exhaust outlets.
- The WUB quad center-exit exhaust is a different configuration. Borla 140839CF uses the outboard dual-split rear exit and is not the system for the WUB center-exit layout. WUB is included with the Z52 Track Performance Package, so confirm the factory exhaust configuration before ordering.
- Valve actuator recalibration is required after installation. The exhaust valve actuators must be recalibrated according to GM Document ID 5406413, and Chevrolet dealer service is recommended for the procedure.
- Current Availability: Custom Made - Ships in 21–28 Business Days. Check the current availability shown on the page before scheduling installation.
CORVETTE COMPATIBILITY
- Generation: C8 Corvette
- Model Year: 2027
- Model: Grand Sport
- Engine: 6.7L LS6 V8
- Transmission: 8-speed dual-clutch
- Body Styles: Coupe and Convertible
- Required Equipment: Factory NPP valved performance exhaust with outboard exhaust outlets
Why Buy This Borla ATAK 140839CF From Custom Corvette Accessories?
Custom Corvette Accessories specializes in Corvette parts, and the 2027 Grand Sport has two rear exhaust layouts that should not be treated as the same application. Borla 140839CF is identified here specifically for the LS6 Grand Sport with factory NPP and the outboard exhaust outlets, while the WUB quad center-exit configuration is separated before you order. You get the exact ATAK carbon-fiber-tip system matched to the correct Grand Sport exhaust layout, with Free Shipping in the Continental 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.
