Cat-Back System

EXCEPT ZR2 & AT4X models. Factory Split Rear Exit vehicles ONLY. Add Adapter 60706 for Crew Cab with Standard Bed (6' 7") 157" Wheelbase vehicles. This 3.5" into dual 2.75" system features BORLA®'s aggressive 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 with no drone inside the vehicle. Replace the Polyphonic Harmonizer behind the muffler in this BORLA® ATAK® system with muffler 60679 to attain the S-Type sound level (quieter than ATAK®). This system features 3.5" black chrome on T-304 stainless steel tips. Using BORLA® Stainless Steel Polish p# 21499 is NOT recommended with these black chrome tips. We suggest cleaning the tips with hot water and a microfiber cloth. Bright chrome on T-304 stainless steel and carbon fiber tips are also available. Installation REQUIRES removal of the Factory Valance Tips. BORLA® Cat-Back™ and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed 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. Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Give your Silverado or Sierra the performance and sound it deserves, bolt on a BORLA®. Best of all, BORLA® stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Additional Information

ATAK Cat-Back Exh. Sys. 2019-2023 Chev. Silv. 1500/ GMC Sierra 1500 (EXCEPT ZR2 & AT4X) 6.2L V8 Auto. Trans. 2 & 4WD Ext. Cab W/Std. Bed (6' 7") 147.7" WB/ Crew Cab W/Short Bed (5' 9") 147.7" WB. Factory Split Rear Exit Vehicles ONLY.

Application Summary

Factory Split Rear Exit Vehicles ONLY. Add Adapter 60706 For Crew Cab With Standard Bed (6' 7") 157" Wheelbase.

Part Type

Exhaust System Kit

Product Overview

EXCEPT ZR2 & AT4X models. Factory Split Rear Exit vehicles ONLY. This system features a black chrome finish on T-304 stainless steel tips. Using BORLA(r) Stainless Steel Polish p# 21461 is NOT recommended with these black chrome tips. We suggest cleaning the tips with hot water and a microfiber cloth. Add Adapter 60706 for Crew Cab with Standard Bed (6' 7") 157" Wheelbase vehicles. System features BORLA(r)'s aggressive ATAK(r) 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. Replace the Polyphonic Harmonizer behind the muffler in the ATAK(r) system with muffler 60679 to attain the "S-Type" sound level (quieter than ATAK(r)). BORLA(r) Cat-Back(tm) and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLa(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow& power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

• Add Adapter 60706 for Crew Cab with Standard Bed (6' 7") 157" Wheelbase vehicles
• EXCEPT ZR2 & AT4X models
• Fits Factory Split Rear Exit Vehicles ONLY
• Installation REQUIRES removal of the Factory Valance Tips
• System features Polyphonic Harmonizer technology. Add Muffler 60679 to attain the S-Type sound level

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Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Exhaust System, ATAK, Cat-back, Stainless, Natural, Split Rear Exit, Black Chrome Tips, Chevy, GMC, 6.2L, Kit

Borla’s ATAK Cat-Back System 140776BC is designed for factory split rear exit vehicles ONLY (except ZR2 and AT4X models). This system features Borla’s aggressive ATAK muffler and Polyphonic Harmonizer Technology which utilizes patented units containing pipes of different diameters and lengths—to create multiple exhaust notes that harmonize to deliver a clean, rich, full-bodied sound. T-304 stainless steel tips with a black chrome finish are included. (Using Borla Stainless Steel Polish P/N 21461 is NOT recommended with these black chrome tips. Borla suggests cleaning the tips with hot water and a microfiber cloth.)

Borla cat-back and axle-back exhaust systems blend 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. Each system is built from premium T-304 stainless steel to deliver the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow and power; and precision computer numerical control (CNC) manufacturing facilitates an accurate fit. Best of all, Borla stands behind every system—just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Additional notes:
• Add Adapter 60706 for Crew Cab with Standard Bed (6 ft. 7 in.) 157 in. wheelbase vehicles.
• Replace the Polyphonic Harmonizer behind the muffler in the ATAK system with muffler 60679 to attain the "S-Type" sound level (quieter than ATAK).