Fel-Pro 1487 Exhaust Header Set Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core. Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets. Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service. Slotted bolt holes allow for easier header installation. Not intended for use in emission controlled vehicles.