Kooks - 9913S2-1/4in. x 4-1/2in. 304 Stainless Steel Slip-On Collector. 4-Into-1 Design. 2-1/4in. I.D. Inlet to Slip Over 2-1/4in. Primaries. Kooks Patented Scavenging Spike. 4-1/2in. O.D. Outlet. Includes 2) A/B Style Tabs. Sold Individually.Kooks...