Patriot Exhaust H7662 2-1 Formed Collectors 1 3/4"x2 1/8"x6 1/2"Available in a wide variety of tube diameters and collector diameters ; 16 gauge mild steel; Sold in pairsPatriot Exhaust's formed collectors provide a smooth transition point for superior exhaust scavenging. Choose from a variety of primary tube and collector sizes.