This 3" diameter single side exit (passenger side) Borla(r) Cat-Back(tm) system features a 4" Round Black Chrome on T-304 stainless steel tip. Using Borla(r) 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. A system with bright chrome on T-304 stainless steel tips is also available. Id delivers the classic S-Type sound with no drone inside the vehicle. Borla(r) Cat-Back(tm) & Axle-Back exhaust systems feature straight-through and patented multi-core technology 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, high-quality T-304 austenitic 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 (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, it's comes with Borla(r) 'S Million-Mile Warranty in the USA and Canada (1.6 million kilometer). Products sold outside of the USA and Canada carry a 3-year limited warranty. See separate note for warranty on tip finish.