Details

• Brand:

  

• SKU:

  85822149

• Other Names:

  Envelope Pkg

• Description:

  Give your vehicle a more aggressive sound with a GMC Accessories Active Exhaust Calibration. When in Sport mode, this calibration changes when and how much the active exhaust valves open making for a louder exhaust note at startup, while cruising and under wide-open throttle. Compatible with 2025+ models with a 6.2L V8 engine (also known as L87). Installation by an authorized GMC Dealer is required.

  ZR2/AT4X Spec Active Exhaust Calibration - GMC Parts Pro (85822149)

  The ZR2/AT4X Spec Active Exhaust Calibration - GMC Parts Pro (85822149) is a genuine OEM performance upgrade designed to optimize the operation of the factory active exhaust system on compatible ZR2 and AT4X models. Developed to GMC Parts Pro’s exact factory specifications, this calibration enhances exhaust system performance while preserving OEM reliability, drivability, and integration with the vehicle’s electronic control systems.

  Engineered to work seamlessly with the factory active exhaust hardware, this OEM calibration adjusts exhaust valve operation to deliver performance-oriented sound characteristics while maintaining proper communication with the vehicle’s engine management and drive mode systems. It is designed to provide consistent operation under a variety of driving conditions without compromising factory functionality.

  Functionally, the active exhaust calibration refines exhaust valve behavior based on engine load, throttle input, RPM, and selected drive modes, depending on the vehicle application. This helps deliver a more engaging exhaust note during spirited driving while maintaining appropriate sound levels during normal cruising and everyday operation.

  As a genuine GMC Parts Pro OEM upgrade, this active exhaust calibration is developed to precise factory software standards, performance parameters, and vehicle compatibility requirements to ensure reliable operation. OEM engineering helps preserve the integration of the exhaust system with the vehicle’s powertrain, emissions, and electronic control systems.

  Installation is recommended when upgrading or servicing the factory active exhaust system, restoring OEM calibration, or enhancing the performance characteristics of compatible ZR2 and AT4X models. Proper installation helps ensure reliable communication between vehicle control modules and consistent exhaust system operation.

  • Genuine GMC Parts Pro OEM active exhaust calibration

  • Designed for compatible ZR2 and AT4X models

  • Optimizes factory active exhaust system performance

  • Enhances exhaust valve operation for performance-oriented sound

  • Maintains seamless integration with factory vehicle systems

  • Developed to OEM software and performance standards

  • Precision-engineered for factory compatibility and reliability

  Choosing the ZR2/AT4X Spec Active Exhaust Calibration - GMC Parts Pro (85822149) helps maximize the performance of your factory active exhaust system while delivering the quality, reliability, and integration expected from a genuine GMC Parts Pro OEM upgrade.

  
  

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