This 3" diameter into dual 2.75" Borla(r) Cat-Back(tm) system features the classic S-Type sound level with no drone inside the vehicle and dual round 3.5" black chrome on T-304 stainless steel tips on each tail pipe. Bright chrome on T-304 stainless steel tips and carbon fiber tips are also available. Installation REQUIRES removal of the Factory Valance 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. Carbon fiber tips with bright centers are also available. 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. Give your Silverado or Sierra the power and sound it deserves bolt on a Borla(r) . 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.