Borla ATAK Axle-Back Exhaust System (11856CB) - 2014-2019 Chevrolet Corvette C7 Stingray & Grand Sport 6.2L V8
Unleash the loudest, most aggressive race-inspired soundtrack available for your sports car with the Borla ATAK Axle-Back Exhaust System. Custom-engineered specifically for 2014 to 2019 Chevrolet Corvette C7 Stingray and Grand Sport models equipped with both Active Fuel Management (AFM) and the Performance Exhaust option (NPP), this premium aftermarket upgrade delivers an uncompromising roar with a stealthy, custom look. ATAK (Acoustically-Tuned Applied Kinetics) technology relies on vehicle-specific internal muffler cores that are precisely calibrated to focus sound waves into a high-definition, earth-shaking V8 growl under heavy throttle. While the exterior volume remains fiercely intense, Borla's painstaking engineering ensures the interior cabin remains devoid of harsh resonance or drone during highway cruising. Featuring high-flow 2.75-inch plumbing, this system maximizes exhaust gas velocity and optimizes scavenging to unlock hidden horsepower and sharpen throttle response.
What sets the Borla 11856CB apart is its seamless integration of functional internal AFM and NPP mechanical valve mechanisms. These exhaust valves accept your factory electronic valve actuators, allowing full retention of the Corvette's drive-mode sound changes and cylinder-deactivation capabilities. Fabricated entirely from premium, aircraft-grade T-304 austenitic stainless steel, this setup is vastly superior to budget aftermarket alternatives or factory T-400 series alloys (such as 409) to provide permanent protection against deep rust, moisture corrosion, and structural cracking. Precision computer numerical control (CNC) manufacturing and ultra-smooth mandrel bends ensure a direct, line-to-line bolt-on slip fitment beneath your chassis. The center-exit rear valence is finished with a stunning set of quad 4.25-inch round, rolled angle-cut intercooled ceramic black coated T-304 stainless steel tips for an aggressive, stealth look. For a complete exhaust overhaul, this axle-back can be combined with Borla's optional mid-section X-Pipe (Part #60548) to create a full Cat-Back system.
Features
- Patented ATAK (Acoustically-Tuned Applied Kinetics) technology delivers Borla's loudest, highest-definition sound
- Projects an uncompromising exterior roar under acceleration while keeping the cabin free of harsh drone
- Features integrated AFM and NPP mechanical exhaust valves to fully retain factory drive-mode and cylinder-deactivation functions
- Constructed completely from heavy-duty, premium T-304 austenitic stainless steel for permanent durability
- Ultra-smooth 2.75-inch CNC mandrel bent tubing eliminates internal bottlenecks to maintain high exhaust gas velocity
- Finished with premium center-exit quad 4.25-inch round, rolled angle-cut intercooled ceramic black coated T-304 stainless steel tips
- Can be combined with Borla X-Pipe (Part #60548) to convert the assembly into a full Cat-Back system
- Direct, precision-engineered bolt-on installation with a line-to-line slip fitment
- Backed by Borla's Million-Mile Warranty on non-moving parts (exhaust valves carry a 1-year warranty)
Fitment By Year, Make & Model
2019 Chevrolet Corvette
- 2019 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM & NPP valves)
- 2019 Chevrolet Corvette Grand Sport 6.2L LT1 V8 (Coupe / Convertible, RWD, Automatic Transmission ONLY, with AFM & NPP valves)
2018 Chevrolet Corvette
- 2018 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM & NPP valves)
- 2018 Chevrolet Corvette Grand Sport 6.2L LT1 V8 (Coupe / Convertible, RWD, Automatic Transmission ONLY, with AFM & NPP valves)
2017 Chevrolet Corvette
- 2017 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM & NPP valves)
- 2017 Chevrolet Corvette Grand Sport 6.2L LT1 V8 (Coupe / Convertible, RWD, Automatic Transmission ONLY, with AFM & NPP valves)
2016 Chevrolet Corvette
- 2016 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM & NPP valves)
- 2016 Chevrolet Corvette Grand Sport 6.2L LT1 V8 (Coupe / Convertible, RWD, Automatic Transmission ONLY, with AFM & NPP valves)
2015 Chevrolet Corvette
- 2015 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM & NPP valves)
- 2015 Chevrolet Corvette Grand Sport 6.2L LT1 V8 (Coupe / Convertible, RWD, Automatic Transmission ONLY, with AFM & NPP valves)
2014 Chevrolet Corvette
- 2014 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM & NPP valves)
- 2014 Chevrolet Corvette Grand Sport 6.2L LT1 V8 (Coupe / Convertible, RWD, Automatic Transmission ONLY, with AFM & NPP valves)
Important Application & Valve Notes:
- **EXCEPT Grand Sport with Manual Transmission:** This system does NOT fit Grand Sport models equipped with a manual transmission due to specific rear differential and cooler line routing constraints.
- Fits **6.2L LT1 V8 engines only**. Does not fit Z06 (LT4) or ZR1 (LT5) supercharged models.
- **Valve Requirements:** Designed specifically for vehicles originally equipped from the factory with **BOTH Active Fuel Management (AFM) valves and NPP Dual-Mode performance valves**. You will reuse your factory electronic actuators on this Borla system.
- **Warranty Note:** Borla's Million-Mile Warranty covers all non-moving stainless steel components. The moving exhaust valve mechanisms are warrantied separately for 1 year. Failures of the original GM factory electronic actuators themselves are not covered.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
