Borla 141003 Cat-Back Exhaust System for Silverado ZR2/Sierra AT4X 1500

The Borla 141003 Cat-Back exhaust system is engineered specifically for the 6.2L Chevrolet Silverado 1500 ZR2 and GMC Sierra 1500 AT4X. This complete exhaust kit delivers the signature Borla S-Type sound—aggressive and distinctive without drone inside the cabin.

Key Features:

• 3.5-inch diameter mandrel-bent tubing for maximum exhaust flow
• Dual 2.75-inch turn-down tailpipes for a clean, aggressive look
• Integrated valve simulator prevents Check Engine Light activation
• Patented straight-through and multi-core muffler technology
• Premium T-304 austenitic stainless steel construction throughout
• Precision CNC manufacturing ensures direct bolt-on fitment
• Upgradeable to ATAK sound level by replacing rear muffler with Polyphonic Harmonizer 60680 (sold separately)

Performance Benefits:

• Unleashes hidden horsepower and torque
• Increased exhaust velocity improves throttle response
• Ultra-smooth mandrel bends eliminate restrictions
• Potential fuel economy gains through reduced backpressure

Borla uses superior T-304 stainless steel rather than inferior T-400 series alloys (like 409 stainless), ensuring exceptional corrosion resistance and longevity. This system is backed by Borla's legendary Million-Mile Warranty, demonstrating their confidence in the quality and durability of every component. A true dual Cat-Back system is also available as an alternative configuration.