This 3.5" diameter into dual 2.75" BORLA® Cat-Back™ system was specifically designed to enhance the power and sound of the Chevrolet Tahoe and GMC Yukon equipped with the 6.2L engine. This system features the mellow Touring sound with no drone inside the vehicle. Split rear exit with dual 4" round black chrome on T-304 stainless steel tips on each side provide a custom appearance. Using BORLA® 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. Systems with bright chrome on T-304 stainless steel tips, and carbon fiber tips are also available. 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. 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.