Ticon Industries High Temperature 3.5" 3 Bolt Gasket with Multi Layer Stainless Steel and Graphite Construction provides high temperature durability under extreme conditions when mating two 3.5" 3 bolt flanges on your exhaust system. The integrated Stainless Steel fire ring to extends gasket life and prevent failure between layers while providing a positive "crush" seal between the two flanges. Compatible with most 3.5"/89mm exhaust three bolt flanges.