This Borla Cat-Back system has a valve simulator to prevent the Check Engine Light from coming on. It was designed specifically for the 6.2L Silverado 1500 ZR2 and Sierra 1500 AT4X. The 3.5 in. diameter system has dual 2.75 in. turn down tail pipes and features the aggressive Borla ATAK muffler and Polyphonic Harmonizer Technology which utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean, rich, full-bodied sound without any drone. Replace the Polyphonic Harmonizer behind the muffler in the ATAK system with muffler 60679 to attain the in.S-Type in. sound level (quieter than ATAK). Borla Cat-Back and Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla Sound of Power respected by motoring enthusiasts everywhere. Ultra-smooth mandrel bends ensure maximum flow and power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Give your ZR2 or AT4X the sound it deserves, bolt on a Borla.

141004 ATAK Cat-Back Exhaust System Features:

• 3.5 in. diameter
• Fits zr2 & at4x models
• Borla system has a valve simulator to prevent the check engine light from coming on
• Muffler 60679 can be added to this system to attain the s-type sound level
• Features turn down tail pipes

Emissions Note:

This part is legal for sale or uses on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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