Fits all six bolt 325, 354, 392 Hemi cylinder heads. Gaskets are .187" thick which help with valvetrain clearance and offer a little extra seal under not perfect flat conditions.
These gaskets are not designed to be used with alcohol or nitromethane burning motors. Those motors need the gasket with the steel shim in them to be NHRA legal, check out part number #2610-0080 for those.
Gaskets are sold in pairs and only fit Gen 1 392 Hemi's.