Description 2-1 Merge Collector, 2.5 Inlet I.D. x 2.5 Outlet O.D., 8.50 Overall Length Material T304 Stainless Steel Warranty Two Year Limited Warranty Notes Part Specifications Inlet Slipover I.D. - 2.50Outlet O.D. - 2.50Overall Length - 8.50All Vibrant Performance Merge Collectors feature complete 16 gauge, 304 Stainless Steel construction, precise fabrication, back purged TIG welds at every seam.