Representative Image Nickson Catalytic Converter Gasket - 31512 Part #: 31512 Line: NIC Nickson Catalytic Converter Gasket Manufacturer's Defect Warranty Material: Fiber, Steel Style: Flat Inside Diameter (in): 2-5/8 Inch Outside Diameter (in): 3-3/8 Inch Number Of Bolt Holes: 2 Bolt Hole Center To Center (in): 4-1/4 Inch Number Of Port Holes: 1 Show More Show Less