Borla ATAK Axle-Back Exhaust System Without NPP Valves (11921CB) - 2016-2024 Chevrolet Camaro SS & 2020-2024 Camaro LT1 6.2L V8
Unleash the full, track-dominant acoustic potential of your naturally aspirated 6.2L V8 engine with the Borla ATAK Axle-Back Exhaust System. Custom-engineered specifically for 2016 to 2024 Chevrolet Camaro SS platforms and 2020 to 2024 Camaro LT1 configurations, this premium system is tailored for enthusiasts who demand the absolute loudest, most aggressive race-inspired sound profile available from the Borla lineup. Standing for "Acoustically Tuned Applied Kinetics," Borla's patented ATAK technology utilizes specialized multi-core internal mufflers that act like a graphic equalizer. It precisely targets, isolates, and amplifies high-frequency racing notes while completely eradicating low-frequency cabin drone. The result is a hyper-aggressive, crisp, and authoritative exhaust note under hard acceleration that remains completely refined and drone-free inside the cockpit during daily highway cruising.
What sets the Borla 11921CB apart is its stealth styling paired with a versatile non-valved layout. This axle-back system does **not** include integrated NPP dual-mode valves, making it the perfect choice for owners who want maximum volume all the time or are converting their single-tip bumper setup over to a quad-tip lower valance. However, if your car is equipped with the factory dual-mode exhaust and you decide you want valved control later, Borla's optional Adapter Kit (Part #60605) can be used to add functional NPP valves to this assembly. The system features an optimized high-flow engineering layout with a 2.75-inch entry path that splits into dual exit paths on each muffler assembly to maximize exhaust gas velocity and throttle response. Fabricated completely from premium-grade, aircraft-quality T-304 austenitic stainless steel, this kit prevents deep rust and structural cracking over time. It completely transforms the rear lower valance with a stunning set of quad 4-inch round, rolled angle-cut lined tips coated in a durable, high-temperature ceramic black finish. Handcrafted via ultra-smooth CNC mandrel bends for an accurate fit and backed by Borla's legendary Million-Mile Warranty, this system brings the ultimate sound of power to your 6.2L Camaro.
For those looking to optimize performance down the road, this axle-back assembly offers an excellent upgrade path. By pairing this kit with Borla's optional X-Pipe with Mid-Pipes—using Part #60607 (for models without AFM valves) or Part #60610 (for models equipped with AFM valves)—you can easily scale this setup into a full high-performance Cat-Back system (applicable to Coupe models only).
Features
- Patented ATAK (Acoustically Tuned Applied Kinetics) mufflers deliver Borla's loudest, most aggressive V8 note
- Non-NPP Configuration: Engineered without internal valves for wide-open volume or single-to-quad tip conversions
- Valved Adaptability: Fully compatible with optional Borla Adapter Kit 60605 to add NPP functional valves later
- Advanced multi-core internal acoustics ensure a fierce exterior presence with absolute zero interior cabin drone
- Constructed completely from premium-grade T-304 austenitic stainless steel for permanent structural integrity
- High-velocity performance layout features a 2.75" inlet transitioning to dual 2.5" rear muffler exit tracks
- Finished with premium quad split rear-exit 4-inch round, rolled angle-cut lined tips with a durable high-temperature ceramic black coating
- Upgradable Design: Expand into a full Cat-Back system using optional Borla Mid-Pipe components (60607 or 60610)
- Precision computer-numerical control (CNC) manufacturing ensures an accurate, line-to-line bolt-on fit
- Backed by Borla's unmatched, industry-leading written Million-Mile Warranty
Fitment By Year, Make & Model
2024 Chevrolet Camaro
- 2024 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
- 2024 Chevrolet Camaro LT1 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2023 Chevrolet Camaro
- 2023 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
- 2023 Chevrolet Camaro LT1 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2022 Chevrolet Camaro
- 2022 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
- 2022 Chevrolet Camaro LT1 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2021 Chevrolet Camaro
- 2021 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
- 2021 Chevrolet Camaro LT1 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2020 Chevrolet Camaro
- 2020 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
- 2020 Chevrolet Camaro LT1 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2019 Chevrolet Camaro
- 2019 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2018 Chevrolet Camaro
- 2018 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2017 Chevrolet Camaro
- 2017 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
2016 Chevrolet Camaro
- 2016 Chevrolet Camaro SS / 1SS / 2SS 6.2L LT1 V8 (Coupe / Convertible, RWD, Non-NPP or Valved w/ Adapter)
Important Application & Compatibility Notes:
- **Bumper Cover / Valance Requirement:** This system features quad output tips and fits models equipped with the factory Dual-Mode Exhaust (NPP) or a dual split rear exit bumper. For single-exit models, it can be installed if converting to a quad-tip dual split rear bumper cover.
- **NPP Valve Status:** This unit is supplied **WITHOUT internal NPP valves**. To implement functional dual-mode valving, Borla Adapter Kit 60605 must be purchased separately.
- **Engine Fitment:** Built exclusively for the naturally aspirated 6.2L LT1 V8 engine. Does not fit V6, 2.0L Turbo, or supercharged ZL1 (LT4) models.
- **Cat-Back Expansion Restriction:** While the axle-back system fits both Coupes and Convertibles, expanding this setup with Borla optional Mid-Pipes (60607 / 60610) to form a complete Cat-Back system is **restricted to Coupe models only** due to underbody chassis structural bracing on Convertibles.
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