Part number: 8002 Universal Exhaust Gasket  8002 gasket specification: 3" Pipe; Universal 3” Collector Flange, 3 Bolt Holes, 3-3/8" Bolt Hole Spacing, 2/Set   High quality and durable materials: Our exhaust gasket is made of ultra thick, pure flexible graphite material, which enables one-time installation and permanent sealing  The standard thickness of the 8002 gasket is 1/8 inch, with a designed compression ratio of 50%, and can fill up to 1/16 inch of the flange surface's depressions or gaps  The 8002 gasket does not contain rubber adhesives or composite materials, and will not shrink or harden over time or temperature changes. There is no need to repeatedly tighten flange bolts