COMPATIBILITY – Fits GMP Performance V8, 396 (6.5L), 402 (6.6L), 427 (7.0L), 454 (7.4L), 502 (8.2L) GET THE RIGHT PART -- Before purchasing, please check the “Amazon Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “Amazon Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core. Inhibits blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets. Nonstick coating permits motion without damaging the gasket and makes it easier to take off the gasket for future engine service. Slotted bolt holes allow for easier header installation. Not intended for use in emission controlled vehicles.