All new CB Performance Graphite Compression Gaskets are specifically engineered to handle the extreme heat and pressures of a high performance engine. These gaskets start off at 1/8" thick, but crush to 1/16", filling the void created by warped or pitted flanges. CB Performance Graphite Compression Gaskets can really take the heat (up to 3000 degrees!), so they are the answer for a perfect seal on a turbo charged engine. Due to the expanded graphite matrix of these gaskets they rebound against the sealing surface so they do not require re-tightening of the exhaust nuts.