EXCEPT ZR2 & AT4X models. Fits Factory Split Rear Exit vehicles ONLY. This Cat-Back™ system by BORLA® features a True Dual design which REQUIRES cutting the Original Equipment (O.E.) Y-Pipe. The system has the famous BORLA® "S-Type" sound level with no drone inside the vehicle. The muffler contains an internal X-Pipe for increased performance and improved sound. This system features 3.5" carbon fiber with bright center tips. Installation REQUIRES removal of the O.E. Valance Tips. Systems with bright chrome on T-304 stainless steel tips, black chrome on T-304 stainless steel tips, and systems that reuse the O.E. tips are also available. 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. All this without the annoying drone often associated with performance exhaust systems. 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.