These Borla(r) 3" diameter tail pipes are designed to work with either Borla(r) 60637, 60638, 60731, or 60732 mid-sections / muffler assemblies, or the Original Equipment (O.E.) mid-section / muffler assembly. They feature single 4.5" round black chrome on T-304 stainless steel tips on each tail pipe. 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. Tail pipes with bright chrome on T-304 stainless steel tips, and carbon fiber tips are also available. Includes heat shields on pipes. 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 our tail piped with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.