Borla ATAK Axle-Back Exhaust System (11863CB) - 2014-2019 Chevrolet Corvette C7 Stingray 6.2L V8 (With AFM / Without NPP)
Unleash the loudest, most aggressive race-inspired soundtrack available for your sports car without compromising your vehicle's factory cylinder-deactivation features with the Borla ATAK Axle-Back Exhaust System. Custom-engineered specifically for 2014 to 2019 Chevrolet Corvette C7 Stingray models equipped with Active Fuel Management (AFM) but without the factory dual-mode performance exhaust (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. Constructed with a high-flow 2.75-inch pipe diameter that transitions to dual 2-inch outlets, this free-flowing layout optimizes exhaust gas velocity and scavenging to unlock hidden horsepower and sharpen throttle response.
What sets the Borla 11863CB apart is its integration of dedicated Active Fuel Management (AFM) valve housings. This system includes functional internal mechanical AFM valve assemblies that seamlessly accept your factory electronic valve actuators, allowing full retention of the Corvette's Eco mode and cylinder-deactivation capabilities without throwing dashboard error codes or check engine lights. 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 section 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 paired 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 mechanical AFM exhaust valves to fully retain factory cylinder-deactivation functions
- Specifically engineered for non-NPP models or vehicles intending to permanently bypass and delete the factory NPP valves
- Constructed completely from heavy-duty, premium T-304 austenitic stainless steel for permanent durability
- Ultra-smooth 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 valves, WITHOUT NPP performance exhaust)
2018 Chevrolet Corvette
- 2018 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM valves, WITHOUT NPP performance exhaust)
2017 Chevrolet Corvette
- 2017 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM valves, WITHOUT NPP performance exhaust)
2016 Chevrolet Corvette
- 2016 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM valves, WITHOUT NPP performance exhaust)
2015 Chevrolet Corvette
- 2015 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM valves, WITHOUT NPP performance exhaust)
2014 Chevrolet Corvette
- 2014 Chevrolet Corvette Stingray 6.2L LT1 V8 (Coupe / Convertible, RWD, Auto/Manual, with AFM valves, WITHOUT NPP performance exhaust)
Important Application & Valve Notes:
- Fits **2014-2019 C7 Corvette Stingray base models only**. Does NOT fit Grand Sport, Z06, or ZR1 configurations.
- Fits **6.2L LT1 V8 engines only**. Does not fit supercharged LT4 or LT5 platforms.
- **Valve Requirements:** Intended strictly for vehicles that are **NOT equipped with factory NPP dual-mode exhaust**, or for owners looking to completely disable/delete the NPP function. It retains the critical AFM valves required to prevent check engine lights during cylinder deactivation.
- **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
