Y-Pipe Inlet Attachment: 4-bolt flange Inlet Diameter (in): 2.500 in. Y-Pipe Outlet Attachment: Slip-fit Outlet Diameter (in): 2.500 in. Y-Pipe Material: Stainless steel Y-Pipe Finish: Natural Oxygen Sensor Bung Included: No Catalytic Converter Included: No Exhaust, Y-Pipe, Stainless Steel, Chevy, Small Block, LS1, Chevy/Pontiac, Camaro/Firebird, Each |