These are .110" thick laminate and have a steel shim in them for strength with a silicone coating on the gasket material so they will not stick and will last under the most extreme conditions. Fits all KB, BAE, Indy, JP-1, CN and Mopar engine blocks. NHRA fuel legal.
Great new feature is Flatout took out the stock dipstick cutout and added to CN Hemi block cut-outs so the gasket will around the rear main with no cutting or grinding. Major time-saver and hassle free.
If you need to order oil pan stud or nuts twenty is the magic number for this gasket.